This is something that is asked from time to time and, unfortunately, there is no "quick fix" way of doing this.
One problem that is sometimes encountered with this type of structure is that it becomes unmanageable and if you have too many fora then your board will slow down. Also if you are staring up a new board having too many fora at the start can have a negative affect on your members making posts - the board just looks empty and members are not sure where to post.
Remember: You only know what you know and - you don't know what you don't know!
My CDB Contributions | How to install an extension
I will not be accepting translations for any of my extensions in Github - please post any translations in the appropriate topic.
No support requests via PM or email as they will be ignored