You could always try this...but it requires alot of pacience and you need to stick at it without giving in. It's Super Nanny's bed time method.

Put the child to bed before you go to bed (with my experience with my Fience's 5 yearold sister this can take over half an hour or almost an hour to do so make sure you've got that time free), read her a story or whatever as you normaly would then leave her room. If/when she gets out of bed, take her by the hand, put her back into bed and say "it's time to sleep now, this is your bed" then leave the room again. If she gets up again, do the same thing, take her by the hand, put her in bed and say "it's bed time" or "this is your bed" if she gets up yet again do the same thing as before "this is your bed" BUT only after those times if she gets up AGAIN just take her to bed without saying anything AT ALL - don't even look at her and keep doing that for as long as it takes, eventualy she'll stay in bed.