This happened to me with a red piece of clothing bleeding into a white oxford shirt. I thought it would never come out! I bought a packet of 'Idye' dye remover- you bring a pot of water to a boil, turn it down to medium add the packet and put the shirt and 'cook' for about 2-3 minutes. Wa-la, the shirt was back to normal. It's cheap, about 3 dollars. Here is a link to the stuff I got, but you could also probably get 'Rit' dye remover at wal-mart and the like. ... View related article.
