Shop by Brand

Does anybody know if it's possible to have the "Shop by Brands" appear in the Category list?
Meaning:
I will appear with the [+] / [-] in front of it, showing the brands under there...

Example:
-Cat A
 -- Sub Cat A
 -- Sub Cat A
-Cat B
 -- Sub Cat B
 -- Sub Cat B
- Shop by Brand
 -- Brand A
 -- Brand B, etc....