Горизонтальное меню на CSS с категориями

<script src="https://cdnjs.cloudflare.com/ajax/libs/modernizr/2.8.3/modernizr.min.js" type="text/javascript"></script>

<header>
  <div class="cd-logo"><a href="#0"><img src="http://icons.iconarchive.com/icons/paomedia/small-n-flat/24/cat-icon.png" alt="Logo"></a></div>
  <nav class="cd-main-nav-wrapper">
  <ul class="cd-main-nav">
  <li><a href="#0">Главная</a></li>
  <li><a href="#0">Новости</a></li>
  <li><a href="#0">Блоги</a></li>
  <li><a href="#0">Контакты</a></li>
  <li>
  <a href="#0" class="cd-subnav-trigger"><span>Категорий</span></a>
  <ul>
  <li class="go-back"><a href="#0">Menu</a></li>
  <li><a href="#0">Скрипты</a></li>
  <li><a href="#0">Шаблоны</a></li>
  <li><a href="#0">Дизайн</a></li>
  <li><a href="#0">Стили</a></li>
  <li><a href="#0">Файлы</a></li>
  <li><a href="#0" class="placeholder">Заполнитель</a></li>
  </ul>
  </li>
  </ul>  
  </nav>  
   
  <a href="#0" class="cd-nav-trigger">Menu<span></span></a>
  </header>
   
  <main class="cd-main-content">
  </main>

body ul, li {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,  
footer, header, hgroup, menu, nav, section, main {
  display: block;
}
body {
  line-height: 1;
}
ol, ul {
  list-style: none;
}
blockquote, q {
  quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
  content: '';
  content: none;
}
table {
  border-collapse: collapse;
  border-spacing: 0;
}
/* --------------------------------  

Primary style

-------------------------------- */
*, *::after, *::before {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
}

body {
  font-size: 1.6rem;
  font-family: "PT Sans", sans-serif;
  color: #33414a;
  background-color: #f2f2f2;
}

a {
  color: #7e4d7e;
  text-decoration: none;
}

/* --------------------------------  

Main Components  

-------------------------------- */
header {
  position: fixed;
  z-index: 3;
  height: 50px;
  width: 100%;
  top: 0;
  left: 0;
  background-color: #33414a;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* Force Hardware Acceleration */
  -webkit-transform: translateZ(0);
  -moz-transform: translateZ(0);
  -ms-transform: translateZ(0);
  -o-transform: translateZ(0);
  transform: translateZ(0);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-transition: -webkit-transform 0.3s;
  -moz-transition: -moz-transform 0.3s;
  transition: transform 0.3s;
}
header.nav-is-visible {
  -webkit-transform: translateX(-260px);
  -moz-transform: translateX(-260px);
  -ms-transform: translateX(-260px);
  -o-transform: translateX(-260px);
  transform: translateX(-260px);
}
header::before {
  /* never visible - this is used in jQuery to check the current MQ */
  display: none;
  content: 'mobile';
}
@media only screen and (min-width: 1024px) {
  header {
  height: 80px;
  }
  header.nav-is-visible {
  -webkit-transform: translateX(0);
  -moz-transform: translateX(0);
  -ms-transform: translateX(0);
  -o-transform: translateX(0);
  transform: translateX(0);
  }
  header::before {
  content: 'desktop';
  }
}

.cd-logo {
  display: inline-block;
  height: 100%;
  margin-left: 15px;
  /* remove jump on iOS devices - when we fire the navigation */
  -webkit-transform: translateZ(0);
  -moz-transform: translateZ(0);
  -ms-transform: translateZ(0);
  -o-transform: translateZ(0);
  transform: translateZ(0);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}
.cd-logo img {
  display: block;
  max-width: 100%;
  margin-top: 14px;
}
@media only screen and (min-width: 1024px) {
  .cd-logo {
  position: absolute;
  z-index: 2;
  margin-left: 5%;
  }
  .cd-logo img {
  margin-top: 29px;
  }
}

.cd-nav-trigger {
  display: block;
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  width: 50px;
  /* hide text */
  overflow: hidden;
  white-space: nowrap;
  color: transparent;
}
.cd-nav-trigger span {
  /* hamburger icon created in CSS */
  position: absolute;
  height: 2px;
  width: 20px;
  top: 50%;
  margin-top: -1px;
  left: 50%;
  margin-left: -10px;
  -webkit-transition: background-color 0.3s 0.3s;
  -moz-transition: background-color 0.3s 0.3s;
  transition: background-color 0.3s 0.3s;
  background-color: #ffffff;
}
.cd-nav-trigger span::before, .cd-nav-trigger span::after {
  /* upper and lower lines of the menu icon */
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: #ffffff;
  /* Force Hardware Acceleration */
  -webkit-transform: translateZ(0);
  -moz-transform: translateZ(0);
  -ms-transform: translateZ(0);
  -o-transform: translateZ(0);
  transform: translateZ(0);
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-transition: -webkit-transform 0.3s 0.3s;
  -moz-transition: -moz-transform 0.3s 0.3s;
  transition: transform 0.3s 0.3s;
}
.cd-nav-trigger span::before {
  -webkit-transform: translateY(-6px);
  -moz-transform: translateY(-6px);
  -ms-transform: translateY(-6px);
  -o-transform: translateY(-6px);
  transform: translateY(-6px);
}
.cd-nav-trigger span::after {
  -webkit-transform: translateY(6px);
  -moz-transform: translateY(6px);
  -ms-transform: translateY(6px);
  -o-transform: translateY(6px);
  transform: translateY(6px);
}
.nav-is-visible .cd-nav-trigger span {
  background-color: rgba(255, 255, 255, 0);
}
.nav-is-visible .cd-nav-trigger span::before {
  -webkit-transform: translateY(0) rotate(-45deg);
  -moz-transform: translateY(0) rotate(-45deg);
  -ms-transform: translateY(0) rotate(-45deg);
  -o-transform: translateY(0) rotate(-45deg);
  transform: translateY(0) rotate(-45deg);
}
.nav-is-visible .cd-nav-trigger span::after {
  -webkit-transform: translateY(0) rotate(45deg);
  -moz-transform: translateY(0) rotate(45deg);
  -ms-transform: translateY(0) rotate(45deg);
  -o-transform: translateY(0) rotate(45deg);
  transform: translateY(0) rotate(45deg);
}
@media only screen and (min-width: 1024px) {
  .cd-nav-trigger {
  display: none;
  }
}

.cd-main-nav {
  position: fixed;
  z-index: 1;
  top: 0;
  right: 0;
  width: 260px;
  height: 100vh;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  visibility: hidden;
  background: #1e262c;
  -webkit-transition: visibility 0s 0.3s;
  -moz-transition: visibility 0s 0.3s;
  transition: visibility 0s 0.3s;
}
.cd-main-nav a {
  display: block;
  font-size: 1.8rem;
  padding: .9em 2em .9em 1em;
  border-bottom: 1px solid #33414a;
  color: #ffffff;
  -webkit-transition: -webkit-transform 0.3s, opacity 0.3s;
  -moz-transition: -moz-transform 0.3s, opacity 0.3s;
  transition: transform 0.3s, opacity 0.3s;
}
.cd-main-nav li ul {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  -webkit-transition: -webkit-transform 0.3s;
  -moz-transition: -moz-transform 0.3s;
  transition: transform 0.3s;
  -webkit-transform: translateX(260px);
  -moz-transform: translateX(260px);
  -ms-transform: translateX(260px);
  -o-transform: translateX(260px);
  transform: translateX(260px);
}
.cd-main-nav.nav-is-visible {
  visibility: visible;
  -webkit-transition: visibility 0s 0s;
  -moz-transition: visibility 0s 0s;
  transition: visibility 0s 0s;
}
.cd-main-nav.moves-out > li > a {
  /* push the navigation items to the left - and lower down opacity - when secondary nav slides in */
  -webkit-transform: translateX(-100%);
  -moz-transform: translateX(-100%);
  -ms-transform: translateX(-100%);
  -o-transform: translateX(-100%);
  transform: translateX(-100%);
  opacity: 0;
}
.cd-main-nav.moves-out > li > ul {
  -webkit-transform: translateX(0);
  -moz-transform: translateX(0);
  -ms-transform: translateX(0);
  -o-transform: translateX(0);
  transform: translateX(0);
}
.cd-main-nav .cd-subnav-trigger, .cd-main-nav .go-back a {
  position: relative;
}
.cd-main-nav .cd-subnav-trigger::before, .cd-main-nav .cd-subnav-trigger::after, .cd-main-nav .go-back a::before, .cd-main-nav .go-back a::after {
  /* arrow icon in CSS */
  content: '';
  position: absolute;
  top: 50%;
  margin-top: -1px;
  display: inline-block;
  height: 2px;
  width: 10px;
  background: #485c68;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}
.cd-main-nav .cd-subnav-trigger::before, .cd-main-nav .go-back a::before {
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
}
.cd-main-nav .cd-subnav-trigger::after, .cd-main-nav .go-back a::after {
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
}
.cd-main-nav .cd-subnav-trigger::before, .cd-main-nav .cd-subnav-trigger::after {
  /* arrow goes on the right side - children navigation */
  right: 20px;
  -webkit-transform-origin: 9px 50%;
  -moz-transform-origin: 9px 50%;
  -ms-transform-origin: 9px 50%;
  -o-transform-origin: 9px 50%;
  transform-origin: 9px 50%;
}
.cd-main-nav .go-back a {
  padding-left: 2em;
}
.cd-main-nav .go-back a::before, .cd-main-nav .go-back a::after {
  /* arrow goes on the left side - go back button */
  left: 20px;
  -webkit-transform-origin: 1px 50%;
  -moz-transform-origin: 1px 50%;
  -ms-transform-origin: 1px 50%;
  -o-transform-origin: 1px 50%;
  transform-origin: 1px 50%;
}
.cd-main-nav .placeholder {
  /* never visible or clickable- it is used to take up the same space as the .cd-subnav-trigger */
  display: none;
}
@media only screen and (min-width: 1024px) {
  .cd-main-nav {
  position: static;
  visibility: visible;
  width: 100%;
  height: 80px;
  line-height: 80px;
  /* padding left = logo size + logo left position*/
  padding: 0 5% 0 calc(5% + 124px);
  background: transparent;
  text-align: right;
  }
  .cd-main-nav li {
  display: inline-block;
  height: 100%;
  padding: 0 .4em;
  }
  .cd-main-nav li a {
  display: inline-block;
  padding: .8em;
  line-height: 1;
  font-size: 1.6rem;
  border-bottom: none;
  -webkit-transition: opacity 0.2s;
  -moz-transition: opacity 0.2s;
  transition: opacity 0.2s;
  }
  .cd-main-nav li a:not(.cd-subnav-trigger):hover {
  opacity: .6;
  }
  .cd-main-nav .go-back {
  display: none;
  }
  .cd-main-nav .cd-subnav-trigger {
  z-index: 1;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 5em;
  -webkit-transition: border 0.3s;
  -moz-transition: border 0.3s;
  transition: border 0.3s;
  }
  .cd-main-nav .cd-subnav-trigger:hover {
  border-color: rgba(255, 255, 255, 0.4);
  }
  .cd-main-nav .cd-subnav-trigger::before, .cd-main-nav .cd-subnav-trigger::after {
  top: 22px;
  right: 17px;
  background-color: #ffffff;
  /* change transform-origin to rotate the arrow */
  -webkit-transform-origin: 50% 50%;
  -moz-transform-origin: 50% 50%;
  -ms-transform-origin: 50% 50%;
  -o-transform-origin: 50% 50%;
  transform-origin: 50% 50%;
  -webkit-transition: -webkit-transform 0.3s, width 0.3s, right 0.3s;
  -moz-transition: -moz-transform 0.3s, width 0.3s, right 0.3s;
  transition: transform 0.3s, width 0.3s, right 0.3s;
  }
  .cd-main-nav .cd-subnav-trigger::before {
  right: 23px;
  }
  .cd-main-nav .cd-subnav-trigger, .cd-main-nav .placeholder {
  padding-right: 2.4em;
  padding-left: 1.1em;
  }
  .cd-main-nav li ul {
  height: 80px;
  background-color: #7e4d7e;
  /* padding left = logo size + logo left position*/
  padding: 0 5% 0 calc(5% + 124px);
  -webkit-transform: translateY(-80px);
  -moz-transform: translateY(-80px);
  -ms-transform: translateY(-80px);
  -o-transform: translateY(-80px);
  transform: translateY(-80px);
  -webkit-transition: -webkit-transform 0.3s 0.2s;
  -moz-transition: -moz-transform 0.3s 0.2s;
  transition: transform 0.3s 0.2s;
  }
  .cd-main-nav li ul li {
  opacity: 0;
  -webkit-transform: translateY(-20px);
  -moz-transform: translateY(-20px);
  -ms-transform: translateY(-20px);
  -o-transform: translateY(-20px);
  transform: translateY(-20px);
  -webkit-transition: -webkit-transform 0.3s 0s, opacity 0.3s 0s;
  -moz-transition: -moz-transform 0.3s 0s, opacity 0.3s 0s;
  transition: transform 0.3s 0s, opacity 0.3s 0s;
  }
  .cd-main-nav .placeholder {
  /* never visible or clickable- it is used to take up the same space as the .cd-subnav-trigger */
  display: block;
  visibility: hidden;
  opacity: 0;
  pointer-event: none;
  }
  .cd-main-nav.moves-out > li > a {
  -webkit-transform: translateX(0);
  -moz-transform: translateX(0);
  -ms-transform: translateX(0);
  -o-transform: translateX(0);
  transform: translateX(0);
  opacity: 1;
  }
  .cd-main-nav.moves-out > li > ul {
  -webkit-transition: -webkit-transform 0.3s;
  -moz-transition: -moz-transform 0.3s;
  transition: transform 0.3s;
  -webkit-transform: translateY(0);
  -moz-transform: translateY(0);
  -ms-transform: translateY(0);
  -o-transform: translateY(0);
  transform: translateY(0);
  }
  .cd-main-nav.moves-out > li ul li {
  opacity: 1;
  -webkit-transform: translateY(0);
  -moz-transform: translateY(0);
  -ms-transform: translateY(0);
  -o-transform: translateY(0);
  transform: translateY(0);
  -webkit-transition: -webkit-transform 0.3s 0.2s, opacity 0.3s 0.2s;
  -moz-transition: -moz-transform 0.3s 0.2s, opacity 0.3s 0.2s;
  transition: transform 0.3s 0.2s, opacity 0.3s 0.2s;
  }
  .cd-main-nav.moves-out .cd-subnav-trigger::before, .cd-main-nav.moves-out .cd-subnav-trigger::after {
  width: 14px;
  right: 17px;
  }
  .cd-main-nav.moves-out .cd-subnav-trigger::before {
  -webkit-transform: rotate(225deg);
  -moz-transform: rotate(225deg);
  -ms-transform: rotate(225deg);
  -o-transform: rotate(225deg);
  transform: rotate(225deg);
  }
  .cd-main-nav.moves-out .cd-subnav-trigger::after {
  -webkit-transform: rotate(135deg);
  -moz-transform: rotate(135deg);
  -ms-transform: rotate(135deg);
  -o-transform: rotate(135deg);
  transform: rotate(135deg);
  }
}

.cd-main-content::before {
  /* never visible - this is used in jQuery to check the current MQ */
  display: none;
  content: 'mobile';
}
@media only screen and (min-width: 1024px) {
  .cd-main-content::before {
  content: 'desktop';
  }
}

.cd-main-content {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  padding-top: 50px;
  background-color: #f2f2f2;
  -webkit-transition: -webkit-transform 0.3s;
  -moz-transition: -moz-transform 0.3s;
  transition: transform 0.3s;
}
.cd-main-content.nav-is-visible {
  -webkit-transform: translateX(-260px);
  -moz-transform: translateX(-260px);
  -ms-transform: translateX(-260px);
  -o-transform: translateX(-260px);
  transform: translateX(-260px);
}
@media only screen and (min-width: 1024px) {
  .cd-main-content {
  padding-top: 80px;
  }
}

.no-js .cd-nav-trigger, .no-js .cd-subnav-trigger {
  display: none;
}

.no-js header {
  position: relative;
  height: auto;
}

.no-js .cd-logo img {
  margin-bottom: 14px;
}

.no-js .cd-main-nav {
  position: static;
  width: 100%;
  height: auto;
  visibility: visible;
  overflow: visible;
}
.no-js .cd-main-nav li {
  display: inline-block;
}
.no-js .cd-main-nav li:last-child {
  display: block;
}
.no-js .cd-main-nav .go-back {
  display: none;
}
.no-js .cd-main-nav li ul {
  position: static;
  width: 100%;
  -webkit-transform: translateX(0);
  -moz-transform: translateX(0);
  -ms-transform: translateX(0);
  -o-transform: translateX(0);
  transform: translateX(0);
}
@media only screen and (min-width: 1024px) {
  .no-js .cd-main-nav {
  height: 80px;
  }
  .no-js .cd-main-nav li ul {
  position: absolute;
  top: 80px;
  }
  .no-js .cd-main-nav li ul li {
  -webkit-transform: translateY(0);
  -moz-transform: translateY(0);
  -ms-transform: translateY(0);
  -o-transform: translateY(0);
  transform: translateY(0);
  opacity: 1;
  }
  .no-js .cd-main-nav li ul li:last-child {
  display: none;
  }
}

.no-js .cd-main-content {
  padding-top: 0;
}
@media only screen and (min-width: 1024px) {
  .no-js .cd-main-content {
  padding-top: 80px;
  }
}

jQuery(document).ready(function($){
  //move nav element position according to window width
  moveNavigation();
  $(window).on('resize', function(){
  (!window.requestAnimationFrame) ? setTimeout(moveNavigation, 300) : window.requestAnimationFrame(moveNavigation);
  });

  //mobile version - open/close navigation
  $('.cd-nav-trigger').on('click', function(event){
  event.preventDefault();
  if($('header').hasClass('nav-is-visible')) $('.moves-out').removeClass('moves-out');
   
  $('header').toggleClass('nav-is-visible');
  $('.cd-main-nav').toggleClass('nav-is-visible');
  $('.cd-main-content').toggleClass('nav-is-visible');
  });

  //mobile version - go back to main navigation
  $('.go-back').on('click', function(event){
  event.preventDefault();
  $('.cd-main-nav').removeClass('moves-out');
  });

  //open sub-navigation
  $('.cd-subnav-trigger').on('click', function(event){
  event.preventDefault();
  $('.cd-main-nav').toggleClass('moves-out');
  });

  function moveNavigation(){
  var navigation = $('.cd-main-nav-wrapper');
  var screenSize = checkWindowWidth();
  if ( screenSize ) {
  //desktop screen - insert navigation inside header element
  navigation.detach();
  navigation.insertBefore('.cd-nav-trigger');
  } else {
  //mobile screen - insert navigation after .cd-main-content element
  navigation.detach();
  navigation.insertAfter('.cd-main-content');
  }
  }

  function checkWindowWidth() {
  var mq = window.getComputedStyle(document.querySelector('header'), '::before').getPropertyValue('content').replace(/"/g, '');
  return ( mq == 'mobile' ) ? false : true;
  }
});