Форум

.lvl1_cont {
   margin-left:9px;
   margin-bottom:5px;
}
.lvl1_href {
   font-family:Tahoma;
   font-size:12px;
   font-weight:bold;
   color:#124584;
   text-decoration:none;
}
.lvl2_cont {
   margin-left:14px;
   margin-bottom:5px;
}
.lvl2_href {
   font-family:Tahoma;
   font-size:11px;
   font-weight:normal;
   color:#0078b0;
   text-decoration:none;
}

.lvl2_href:hover {
   font-family:Tahoma;
   font-size:11px;
   font-weight:normal;
   color:#124584;
   text-decoration:none;
}

.lvl2_href#active_menu {
   font-family:Tahoma;
   font-size:11px;
   font-weight:normal;
   color:#124584;
   text-decoration:underline;
}

<div id="left_menu"> 
          <div><img width="250" src="/images/left_menu_top.jpg" /></div>
         
          <div id="menu_header">Продукция</div>
         <?$APPLICATION->IncludeComponent(
   "bitrix:menu",
   "birssmenu",
   Array(
      "ROOT_MENU_TYPE" => "cat", 
      "MAX_LEVEL" => "3", 
      "CHILD_MENU_TYPE" => "left", 
      "USE_EXT" => "Y" 
   )
);?> 
          <div><img width="250" src="/images/left_menu_bottom.jpg" /></div>
         </div>

#left_menu { 
    position:absolute; 
    top:249px; 
    left:50%; 
margin-left: -442px; 
    background-image:url(/images/left_menu_spacer.jpg); 
    background-position:top left; 
    background-repeat:repeat-y; 
}