It appears that you can set the visible property of a ribbon bar category item but it seems to have no effect. It stays visible. I tried this. I tried it from the open event of the frame and I tried to post to a user event after the open. It stays visible. I could delete and insert but then I would have to recreate all of the pieces in the category. Surely I'm doing something wrong. Anyone have any ideas?
rbb_1.GetItemByTag ("CategoryOrderTest", ref lr_Category)
lr_Category.visible = false