I can't really tell from the picture but it appears you have excessive toe on the tires. So instead of the tires rolling "straight" down the road, they are constantly angled either in or out which is causing a sideway scuffing action, thus uneven wear. If it is in the front, it's easy to fix. If it is the back then you need to have a friend drive behind you and make sure you are not dogtracking before you get too deep into it.
Life is Good