Borders around Category Groups

I'm using Expanded Categories List to show all products in a side box, and I'd like to group them with a border so each category is visually separated in its own box displaying its products.

I'm porting my html site over to zen cart and I achieved this on my current site just by structuring it as an unordered list and styling it that way. Easy. But I can only find a plugin that displays all products in <span>s or a plugin that structures it as an unordered list but doesn't show each individual product.

Is there a happy medium?

Please provide a link to the site.

http://www.shakatourshonolulu.com/ecotours/ is how my site looks now and how I want my site to look like.

http://www.shakatourshonolulu.com/zencart/index.php?main_page=index&cPath=65 is where i'm at. It displays everything expanded (along with all the demo products still in there, I know) which is what I want, but I want to be able to put a border around things in the same category.

I'm changing my zen-cart template piece by piece to resemble the old site. As a last resort I'm ready to just insert the html side-bar in the body of all pages, but I'd like to utilize the functionality of zen cart.