There are a few ways. The easiest would be
https://community.mybb.com/mods.php?action=view&pid=39
Hope this helps!
MyBB Support
Ads between categories
Submitted by ash7890, 22-05-2018, 01:22 PM, Thread ID: 89377
Thread Closed
RE: Ads between categories 19-06-2018, 03:01 PM #2
19-06-2018, 03:01 PM
#2