nav {
    width: 960px;
}
nav ul {
    padding: 0px;
    margin: 0px;
}
nav ul:after {
    clear: both;
    content: " ";
    display: block;
    font-size: 0;
    height: 0;
    visibility: hidden;
}
    nav ul,nav ul li{
    background-color: #FAFAFA;
}
    nav ul li {
    list-style: none;
    float:left;
}
nav ul li a {
    text-decoration: none;
    display: block;
    color: #333;
    padding: 14px 34px 14px 34px;
}
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:hover{
    color: #333;
}
/*Nun ergänzen wir den Code um ein paar Effekte*/
nav ul {
    padding: 0px;
    margin: 0px;
 
    box-shadow: 2px 2px 2px #dfdfdf;
    -moz-box-shadow: 2px 2px 2px #dfdfdf;
    -webkit-box-shadow: 2px 2px 2px #dfdfdf;
}
nav ul li {
list-style: none;
    float:left;
    border-right: 1px solid #dfdfdf;
}
nav ul li a {
    text-decoration: none;
    display: block;
    color: #333;
    padding: 14px 34px 14px 34px;
 
    -webkit-transition: background 0.3s ease-out 0s;
    -moz-transition: background 0.3s ease-out 0s;
    -o-transition: background 0.3s ease-out 0s;
    transition: background 0.3s ease-out 0s;
}
nav ul li.cat1:hover a, nav ul li.cat1:hover > ul li a  {
    background-color: #E6DD00;
}
nav ul li.cat2:hover a, nav ul li.cat2:hover > ul li a  {
    background-color: #8CB302;
}
nav ul li.cat3:hover a, nav ul li.cat3:hover > ul li a {
    background-color: #008C74;
}
nav ul li.cat4:hover a, nav ul li.cat4:hover > ul li a {
    background-color: #004C66;
}
nav ul li.cat5:hover a, nav ul li.cat5:hover > ul li a {
    background-color: #332B40;
}
nav ul li:hover > a {
    color: #FAFAFA;
}
nav ul li ul li a {
    color: #FAFAFA;
}
nav ul li ul li a:hover{
    color: #333;
    background-color: #FAFAFA !important;
}