I am having trouble with some CSS.

I want the productlistheading shown here: http://greenleafexhibits.com/index.p...=index&cPath=1


to be the same as the centerboxheading shown here:
http://greenleafexhibits.com/index.p...=shopping_cart


Basically making the categories display in the black styled boxes.

Looks like the h1 needs to become h2, but I'm not sure.

Any thoughts? Easy solution?