Can the products be turned off from displaying at this level: http://gansinkdigital.com.dock.arvixe.com/cart/poster-graphics
so just the Categories display?
There is a "Show products from subcategories"setting in the Catalog Settings in the administration.
So if you disable this setting it will show only products from the current category. If you don't have such products then only the subcategories will be visible but not their products.