Fake files section folders

Some of my clients have a lot of pages in the files section. It’s a long list and hard to navigate. If there was an option to create “fake” folders where pages could be placed in groups (I often have several types of page templates), that would be great.

It can be like accordion, for example. In scenarion I have 40 pages in pages section, I can divide them into lets say 5 groups. Better to navigate between them. But folders are even better. Like iframed pages section (So user dont have to switch between pages) with user defined pages groups.