Ticket Type Request

On my registration from I have a lot of Ticket Types that I need to categorize. The only way that I can see to do that now is to add a Ticket Type with a fee of $0 and then add the sub category types under that. Doing that shows a price of $0 on the registration form. It would be nice if you could add a checkbox or something to indicate that a Ticket Type is a header, not really a type of ticket, and leave the price & quantity fields blank. See the image.

Thanks!