Help with category drop down menu

Good Afternoon,

I am trying to find a little bit of help. basically I have my site about 60-70% done, but an now working on fine tuning the details. If you head over to Dorkutopia.com and check out the top navbar it has three listed drop downs.

Home | DU HQ | Categories

And i have the code set up like so

<div id=”navbarleft”>
<ul id=”nav”>

• “>Home

<?php wp_list_pages(‘title_li=&depth=4&sort_column=menu_order’); ?>

• Categories

<?php wp_list_categories(‘title_li=&depth=4&orderby=name’); ?>

</div>

Basically, I would like to break it down so my parent categories are listed across the nav bar, with the children as drop downs. I can seem to figure out what I am missing as I the tutorials and PhP i found just broke the layout of my site.

Any help would be appreciated