Выпадающее меню в виде вкладок

<nav>
  <ul>
  <li><a href="index.html" class="icon home"><span>Главная</span></a></li>
  <li class="dropdown">
  <a href="index.html">Разделы</a>
  <ul>
  <li><a href="index.html">Шаблоны</a></li>
  <li><a href="index.html">PHP</a></li>
  <li><a href="index.html">JavaScript</a></li>
  <li><a href="index.html">CSS</a></li>
  </ul>
  </li>
  <li class="dropdown">
  <a href="index.html">Браузеры</a>
  <ul class="large">
  <li><a href="index.html">Firefox</a></li>
  <li><a href="index.html">Google Chrome</a></li>
  <li><a href="index.html">Safari</a></li>
  <li><a href="index.html">Opera</a></li>
  <li><a href="index.html">Internet Explorer</a></li>
  </ul>
  </li>
  <li class="active"><a href="index.html">Обратная связь</a></li>
  <li><a href="index.html">RSS подписка</a></li>
  </ul>
  </nav>

nav {
  height: 34px;
  border-bottom: 5px solid #fff;
  -webkit-box-shadow: inset 0 -2px 1px rgba(0, 0, 0, 0.03);
  -moz-box-shadow: inset 0 -2px 1px rgba(0, 0, 0, 0.03);
  box-shadow: inset 0 -2px 1px rgba(0, 0, 0, 0.03);
}
nav > ul > li {
  float: left;
  margin-right: 3px;
}
nav > ul > li > a {
  display: block;
  height: 34px;
  line-height: 34px;
  padding: 0 20px;
  color: #fff;
  font-weight: bold;
  text-shadow: 0 -1px rgba(0, 0, 0, 0.3);
  border-radius: 3px 3px 0 0;
  background-color: #759aaf;
  background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #9cb6c5), color-stop(100%, #759aaf));
  background-image: -webkit-linear-gradient(top, #9cb6c5, #759aaf);
  background-image: -moz-linear-gradient(top, #9cb6c5, #759aaf);
  background-image: -ms-linear-gradient(top, #9cb6c5, #759aaf);
  background-image: -o-linear-gradient(top, #9cb6c5, #759aaf);
  background-image: linear-gradient(top, #9cb6c5, #759aaf);
  -webkit-box-shadow: inset 0 1px rgba(255, 255, 255, 0.3), inset 0 -2px 2px rgba(0, 0, 0, 0.03), 0 2px white, 0 0 2px rgba(0, 0, 0, 0.2);
  -moz-box-shadow: inset 0 1px rgba(255, 255, 255, 0.3), inset 0 -2px 2px rgba(0, 0, 0, 0.03), 0 2px white, 0 0 2px rgba(0, 0, 0, 0.2);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.3), inset 0 -2px 2px rgba(0, 0, 0, 0.03), 0 2px white, 0 0 2px rgba(0, 0, 0, 0.2);
}
nav > ul > li > a:hover {
  text-decoration: none;
  background-color: #85a6b8;
  background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #afc5d1), color-stop(100%, #85a6b8));
  background-image: -webkit-linear-gradient(top, #afc5d1, #85a6b8);
  background-image: -moz-linear-gradient(top, #afc5d1, #85a6b8);
  background-image: -ms-linear-gradient(top, #afc5d1, #85a6b8);
  background-image: -o-linear-gradient(top, #afc5d1, #85a6b8);
  background-image: linear-gradient(top, #afc5d1, #85a6b8);
}
nav > ul > li.active > a, nav > ul > li > a:active, nav > ul > li.dropdown:hover > a {
  background: #fff;
  color: #404040;
  text-shadow: none;
  -webkit-box-shadow: 0 2px white, 0 0 2px rgba(0, 0, 0, 0.2);
  -moz-box-shadow: 0 2px white, 0 0 2px rgba(0, 0, 0, 0.2);
  box-shadow: 0 2px white, 0 0 2px rgba(0, 0, 0, 0.2);
}
nav a.icon {
  position: relative;
  width: 40.8px;
  padding: 0;
}
nav a.icon span {
  display: block;
  text-indent: -1000px;
  overflow: hidden;
  position: absolute;
  top: 9px;
  left: 12px;
  height: 16px;
  width: 16px;
  background-repeat: no-repeat;
  background-position: 0 0;
}
nav a.icon.home span {
  background-image: url("../img/home.png");
}
nav .active a.icon span, nav a.icon:active span {
  background-position: 0 -16px;
}

.dropdown {
  position: relative;
  border-bottom: 5px solid #fff;
}
.dropdown:hover ul {
  display: block;
}
.dropdown ul {
  display: none;
  position: absolute;
  top: 39px;
  left: -1px;
  min-width: 160px;
  padding: 0 0 5px;
  background: #fff;
  border: 1px solid #dadada;
  border-top: 0;
  border-radius: 0 0 3px 3px;
  -webkit-box-shadow: 0 0 1px rgba(0, 0, 0, 0.04);
  -moz-box-shadow: 0 0 1px rgba(0, 0, 0, 0.04);
  box-shadow: 0 0 1px rgba(0, 0, 0, 0.04);
}
.dropdown ul.large {
  min-width: 200px;
}
.dropdown li {
  display: block;
  margin: 0 18px;
  overflow: visible;
}
.dropdown li + li {
  border-top: 1px solid #eee;
}
.dropdown li a {
  display: block;
  color: #555;
  padding: 8px 18px;
  margin: 0 -18px;
}
.dropdown li a:hover {
  color: #222;
}