http://www.vbulletin.com/forum/showthread.php?t=224641
Just copy and paste.
Code:
<td id="custommenu" class="vbmenu_control">
<a href="#">Custom Menu</a>
<script type="text/javascript">
vbmenu_register("custommenu");
</script>
</td>
<div class="vbmenu_popup" id="custommenu_menu" style="display:none">
<table cellpadding="4" cellspacing="1" border="0">
<tr>
<td class="thead">Custom Menu</td>
</tr>
<tr>
<td class="vbmenu_option" title="nohilite">
content row
</td>
</tr>
<tr>
<td class="vbmenu_option" title="nohilite">
content row
</td>
</tr>
<tr>
<td class="thead">Header Like in Quick Links</td>
</tr>
<tr>
<td class="vbmenu_option" title="nohilite">
content row
</td>
</tr>
<tr>
<td class="vbmenu_option" title="nohilite">
content row
</td>
</tr>
</table>
</div>