Please help! what is the best treatment for foot drop?

Depends: On why you got it. In some cases if you relieve the pressure on a compressed nerve that caused it then you can regain all motion, it could be secondary to a stroke, or other injury so obviously you would try and reverse the effect if possible but it is not always possible. Aggressive physical therapy is important as you might try and retrain as much as you can, other options include a brace.

Foot drop: As stated , the cause first needs to be determined. Start with your podiatrist who will work with other doc's as needed to determine the cause and the best treatment for you