Can you go back and change it? Probably not, so move on from it and like previously mentioned be honest, they may not find out if you lie, but you sure as hell don't want to be caught if you try.
When I was filling out paperwork at my recruiter's office before submitting my package someone called and asked if having an arrest on your record would be to much of a negative impact, he turned to one of the other ORs and asked him what he thought about an arrest. The other OR asked what the arrest was for, she said she was caught with a crack pipe at a party. The other OR and my OR agreed that she would not pass a selection board. So unless ORs are curious and just like to hear why you were arrested, I got from his asking that there are "acceptable" arrests.
Hope that helps, but don't focus on the negative spend time making your positives really standout.