Is there a way to have a "page" appear in the menu as only a category for the sub-pages so that, either, there actually is no page at all or that, if it must exist, that it can't be followed?
I'll give an example in case I'm not sufficiently clear.
For a restaurant site,"Our services" is in the top level of the menu. Under that appears "Catering", "Delivery", etc. There needn't be any content on the "Our services" page; it only serves to group the other actual pages.