Class Default Sublist Conditions

I am currently working on loot stats and in an attempt to keep everything organized I have setup some enums in a parent/child layout (content wise). I am trying to setup the class defualts to display information based on a heirarchal selection type. Similiar to how the replication options work where the replication type drop down is greyed out until you enable replication. So I have 1 enum that holds the categories and another that holds the information of that category. I want to have it so that I select the main category then it will show all the options for that category.