This will generate a menu like on http://shapeways.com/shops/propmodule
For it to work you need to make shop categories with the names Category[SubCategory] see the list of shop categories on example site for examples. Once you have made all the shop categories enter them as a coma delimited list with no spaces in between.
For example my site uses:
Sides,Build Type,Dice Set,Specialty,Material,Non Dice,Customizable
If the category exists by itself(I.E. Customizable) no sub sections will be looked for and the number of proucts in that category will be listed.
Please note that case is important