ul#about_info_menu{
    margin: 10px auto 20px;
    border-top: 1px solid #999999;
    border-bottom: 1px solid #999999;
}
ul#about_info_menu li{
    display: inline-block;
    vertical-align: middle;
    text-align: center;
    width: 240px;
}

ul#about_info_menu li.selected {
    background-color: #CCCCCC;
}