This is a way which may be used to Group Pages.
I have always thought the CategoryCategory tag was a confusing way to group the Categories pages. I thought at first something like CategoryList would be better, but it would be ambiquous, since it could also refer to lists in general. Many of the CategoryCategory pages share a grouping characteristic more than they do a category characteristic.
Here is a solution which can be used in wikis, if not in this one:
Tag the page at its bottom with something like: