nav {
    width: 800px;
}
nav ul {8
    padding: 0px;
    margin: 0px;
    box-shadow: 2px 2px 2px #000;
    -moz-box-shadow: 2px 2px 2px #dfdfdf;
    -webkit-box-shadow: 2px 2px 2px #dfdfdf;
 }

nav ul:after {
    clear: both;
    content: " ";
    display: block;
    font-size: 0;
    height: 0;
    visibility: hidden;
}

nav ul,nav ul li{
}
nav ul li {
	list-style: none;
	float:left;
	border-right: 2px solid #dfdfdf;
	box-shadow:-1px -1px 5px #666;
}
nav ul li a {
    text-decoration: none;
    display: block;
    color: #333;
    padding: 15px 13px 15px 13px;

    transition: background 0.3s ease-out; /* explorer 10 */
    -webkit-transition: background 0.3s ease-out; /* chrome & safari */
    -moz-transition: background 0.3 ease-out; /* firefox */
    -o-transition: background 0.3 ease-out; /* opera */
}

nav ul li.cat1:hover a, nav ul li.cat1:hover > ul li a  {
	background-color: #A6A6FF;
	opacity: 0.9; 
}
nav ul li.cat2:hover a, nav ul li.cat2:hover > ul li a  {
    background-color: #A6A6FF;
	opacity: 0.9;
}
nav ul li.cat3:hover a, nav ul li.cat3:hover > ul li a {
    background-color: #A6A6FF;
	opacity: 0.9;
}
nav ul li.cat4:hover a, nav ul li.cat4:hover > ul li a {
    background-color: #A6A6FF;
	opacity: 0.9;
}
nav ul li.cat5:hover a, nav ul li.cat5:hover > ul li a {
    background-color: #A6A6FF;
	opacity: 0.9;
}

nav ul li:hover > a {
    color: #FAFAFA;
}
nav ul li:hover > ul {
    visibility: visible;
}

nav ul li ul{
    display: inline;
    visibility: hidden;
    position: absolute;
    padding:0px;
}
nav ul li ul li{
	float: none;
}
nav ul li ul li a {
    color: #FAFAFA;
}
nav ul li ul li a:hover{
	color: #333;
	background-color: #FAFAFA !important;
}