Hiding posts instead of categories?

[Munch98]

I want unregistered users to be able to SEE that we have multiple forum categories but I don't want them to be able to see what's inside them, how would I do this?

I know most forums just hide the category completely until you're registered but I don't want to do this.

Below is an example from another forum:


--------------- Added [DATE]1338646715[/DATE] at [TIME]1338646715[/TIME] ---------------

Edit: Blah, was fairly easy my bad.