ul#tags {
    display: block;
    float: left;
    clear: both;
    width: 100%;
    padding: 10px;
}
ul#tags li {
    display: block;
    float: left;
    margin: 0px 15px 25px 0;
}
ul#tags li a {
    background: #dfdfdf;
    padding: 5px 15px;
    border-radius: 5px;
    box-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}