Um, why post this on the forums when only 2 guilds or your friends can join. This would be more of a topic for your guild's message board as well as that other guilds message board. If you want to make contact to your friends and let them know about it, just send them a pm.
Because all players could take part, but if they wasnt my friend before i made the tournament, they will have to join to one of the guilds.
So I think I could post it here.
If it is really the wrong place admin wouldnt acepted it, would they?
I once saw a help thread on the sales and purchases threads, mistakes happen. So what you are saying is "join one of these guilds and/or befriend me in order to compete in my event"? That's how it's coming across to me