Can't you do this with a Rogue and the right alchemical items combined with sleight of hand?
Anyways, the Charlatan prestige class is what you're looking for.
Read more: http://www.enworld.org/forum/showth...-created-a-Stage-Magician-class#ixzz44h29TpfH
But with that said, one of my favorite series of fantasy novels has all sorts of different types of magic and magicians, including "prestidigitators", who are essentially just stage magicians. The only time they actually came up was when the main character of one of the novels needed to hire a magician to help fight and found the prestidigitator's tricks to be mostly useless from a practical point of view.
It seems to me that the demand for fake magic would be pretty nonexistent in a world with real magic. A 1st level wizard can do more impressive things than even the most impressive real-world stage magicians. It's be like having a fake singer or a fake dancer or something, when there are people who can actually sing and dance all around the place.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.