SWEP Bases

So I am building a hierarchy of sweps for my new gamemode and have realized something rather annoying, SWEP.Category does not continue to any children so every child must have the SWEP.Category set. As I looked around, I saw that the prop spawnlists, there is sublists on the menu with some of the props/ragdolls. I was wondering if we could get this also for weapons so we can just have 1category, with multiple sub categories. Thanks for any responses.