.ul_nav {
    padding:0;
    margin:0;
    list-style:none;
    display:inline-block;
    margin:30px auto 20px;
}
    .ul_nav:after {
        display:block;
        content:"";
        clear:both;
    }
    .ul_nav li {
        padding:5px 12px;
        float:left;
        display:inline-block;
        margin:5px;
        border-radius:20px;
        cursor:pointer;
    }
        .ul_nav li:last-child {
            margin-right:0;
        }