need hide mod

I have been google'n this for a couple days now and i cant find a good hide mod...what i need mine to do is when someone puts
[hide]text[/hide] the "text" is hidden from everyone including admins until they have made a post..something like this would show up

"You must be a registered user and post in this topic too see hidden content. If you are not registered, then click here ->(register link)"

everytime i get close to finding one it works only for guests or its not updated and doesnt work with this version...so can you guys please help me out?