in BE we got 3 views:
"all" -> Displays all Products Categories and Sub category (without slide down)
"current" -> Displays The Current View Sub Categorys (open - dlide down) and also the Others Main Categories (not Open)
"default" -> This dont do nothing! i cant find different from current view...
So... How about Build and Option View only to Display all Current Sub Categorys and HIDE the Others Main Categories ??
Another major suggestion is to include a function to select just a single product. This allows a finer control of modulising product layout