Here are some picture examples (they are horrible looking though but the concept is what I like).
As you see, parent categories on left panel and child on right
Once you click on a child link, they have title, picture, description, links/tables and sharing icons
Below even longer tables and then eBay API which shows eBay items related to the specified content.
If anyone knows how to do this, in a nice and organized way, including eBay API programming, please let me know. That website is obviously not organized or Xenforo based so it's not neat but I want that concept on my Xenforo forum.