If you do not prioritize legs you will probably continue to have an unbalanced physique, unless your legs happen to grow more rapidly than the rest of your of your body. So the question in my mind is how quickly do you want to correct the imbalance? If you are in a hurry, you will probably want to switch to a maintenance scheme for the rest of your physique while prioritizing legs.
See Chad's recent article "Perfect 10 Training" for an example of how to prioritize a lagging muscle group. In that thread I list a sample routine I plan on using for legs.
Another approach would be to keep doing whatever program you chose and simply working your legs harder. You can do this by working legs closer to concentric failure or by doing more set/rep volume for legs compared to your other muscle groups. Chad's "The Set/Rep Bible" article is also a useful read.
Perfect 10 Training:
The Set/Rep Bible: