How to hide/remove categories?

FYI im not talking about the hiding jobs under the certain category, only the category bar itself. I do not want my jobs to be categorized.

http://imgur.com/a/lRRw8 im making a classic/less complex server that relies on roleplay quality so i want under 20 jobs. Since there is not alot i’ve decided to not have categories whatsoever

Try making a f4 menu that just shows all the jobs without categories.

no idea how to do that