I'm wondering if there's a way I can have sub categories. Basically, I have a primary category of 'membership', however if a user selects an option of, say, Primary Producer, from the drop down list, I want them to then be forced to select options from 3 sub categories of that.
Hope that makes sense
I don't mind if the sub categories are displayed or not (altho prefer them to only show up when the appropriate primary category is selected).
Any help appreciated.
Cheers
Ruby