My own 2 year old daughter (almost 3 soon!), had been giving me trouble at nap time for a long time. She would not settle down and kept getting out of her bed, even though she was tired. The only thing that worked was to warn her that if she didn't lay down quietly and go to sleep that she wouldn't be allowed to watch a cartoon when she woke up. The only time she gets TV during the day is after nap, so after a few times of missing out on cartoons she doesn't give me trouble anymore.

So I would use some type of consequence for after naptime if she doesn't settle down at nap time quietly,