The best thing you can do is to get a lawyer to represent him. I am not sure from your post in DUI whether your husband was charged with illegal drug possession, illegal drug trafficking, DUI drugs or some combination. In any case the consequences can be severe. He will need the help of an experienced lawyer.
DISCLAIMER- THIS IS NOT INTENDED TO AND DOES NOT CONSTITUTE LEGAL ADVICE AND DOES NOT ESTABLISH AN ATTORNEY-CLIENT RELATIONSHIP. CONSULT QUALIFIED LEGAL COUNSEL IN YOUR CITY OR STATE FOR IMMEDIATE LEGAL ADVICE.