Just apply for another Driver's license. The DMV in California will verify your photograph, SSN, and your personal information that was on your Driver's license after filling out another Driver License application(DL 44C).
Make a report with the police station. Then go down to the DMV and alert them to the fact that your license has been lost and you will be needing a replacement.
You should go to the DMV and get a new driver's license. You also shouldn't drive if you can't find your driver's license as that can get you in a lot of trouble.
you should do a F. I. R in police-station that your driver's license has been lost by you. than make a photostat of that F. I. R and give to the local license office. they would issue a new license