I built a form today using the "category" option in the Post Fields menu. What I'd like to do is extend this feature to operate just as it does now, self populating with my WP post categories, updating the dropdown with any changes made to categories etc, but with a heirarchy of three levels of category; category>sub-category>niche-category. I'd like to include the three levels as a selectable item in three menus on the form so that when a specific category is selected, the available sub categories change, then when a sub-category is selected, the available niche-categories change. I have over 600 niche categories, spread across 50 or so sub-categories, spread across 8-10 categories. Is this possible with Gravity forms?
I have a feeling it too is a custom enhancement but surely someone's done this before. If this is a custom piece I want to figure out an efficient way to have this developed so that it will function with new releases as well with full compatibility. I need to know what tools are available to spell out what needs to be developed for full compatibility, and I am looking for direction to keep this simple, straightforward and interchangeable amongst themes. Also, if anyone has already implemented this solution, please advise.