<div class="catnav">
<ul>
  <li><a href="#">CATEGORY</a>
    <ul>
      <li>Florists</li>
      <li>Caterers</li>
      <li>Formal Wear</li>
      <li>All Categories...</li>
    </ul>
  </li>
</ul>
</div>

.catnav ul {list-style:none;margin:0px;padding:0px;}
.catnav li {float:left;text-align:center;position:relative;background:#f5f6f7;padding:0px 10px 0px 10px;}
.catnav li ul li {float:none;width:150px;text-align:left;padding-left:0px 0px 0px 5px;line-height:17px;}
.catnav a {text-decoration:none;color:#548dd4;font-family:arial;}

.catnav li ul {position:absolute;top:21px;left:0px; border:1px solid #ccc;
    -moz-box-shadow: 0px 3px 10px #aaa;
    -webkit-box-shadow: 0px 3px 10px #aaa;
    box-shadow: 0px 3px 10px #aaa;
    visibility:hidden;}
.catnav li:hover ul {visibility:visible;z-index:100;}
.catnav li:hover {background:#e0e0e0;}
.catnav li:hover li a {font-size:0.8em;font-weight:normal;visibility:visible;z-index:100;}