Как сделать выпадающие вертикальное меню для шаблона на DLE 10.6-11.?

<nav id="top-menu">
  <div class="center clr">

    <ul id="top-nav">
      <li><a href="/">Главная</a></li> 
   <li><a href="/index.php?do=feedback">Контакты</a></li>
   <li><a href="/rules.html">Правила</a></li> 
    </ul>

#top-menu {
    height: 67px;
    background: #3b3b3b;
    margin-bottom: 30px;
}

#top-nav li {
    float: left;
    position: relative;
    z-index: 999;
}

#top-nav {
    float: left;
    border-left: 1px solid #2f2f2f;
}

#top-nav li a {
    display: block;
    color: #f5f5f5;
    border-right: 1px solid #2f2f2f;
    line-height: 67px;
    padding: 0 24px;
    transition: box-shadow 0.4s, color 0.4s;
    position: relative;
}

#top-nav li a:hover {
    box-shadow: inset 0 -4px 0 #fcb245;
    color: #f39f1a;
}

#searchform {
    float: right;
    margin-top: 13px;
}

#searchform input[type=text] {
    display: block;
    background: url("../images/search-icon.png") no-repeat 11px;
    padding-left: 32px;
    border: 1px solid #575656;
    height: 39px;
    border-radius: 3px;
    width: 147px;
    padding: 0 11px 0 43px;
    color: #999;
    font-size: 12px;
    transition: border 0.4s;
}

#searchform input[type=text]:focus {
    border: 1px solid #fcb245;
}

#top-nav .active a {
    padding: 0 53px 0 24px;
}
.up{width: 200px;}

#top-nav .active .link:after {
    content: "";
    position: absolute;
    width: 12px;
    height: 8px;
    background: url("../images/arrows.png");
    top: 31px;
    right: 24px;
}

#top-nav .active .link:hover:after, .active-for a:after {
    background: url("../images/arrows.png") right !important;
}

#top-nav .active ul {
    display: none;
}