it depends upon which course you are talking about, both navy courses are public-ish (if that is even a word haha) what i mean is certain times of the day they allow non-military to play the course. from what i understand, el toro golf course is closed, but los alomitos is open and accessible to anyone only for certain tee times...hope this helps...
also check
Discounted Golf Tee Times and Last Minute Golf Tee Times - Click4TeeTimes.com, or southlandgolf magazine, or just search orange county golf courses in google, you should get some phone numbers or places to double check.