This question is asked regularly. The answer is: nearly impossible.
http://www.ucop.edu/residency/establishing-residency.html
UC “follows the money”. If your UC tuition and living expenses are paid by an out-of-state family, then you won’t qualify as a California resident. Either (1) your family has to move to California, so they can pay for your tuition and living expenses with money earned in California, or else (2) you have to get a job in California, and earn enough money in California to pay for your tuition and living expenses all by yourself.
You could maybe try marrying a California resident from a wealthy family that would be willing to pay for an in-law’s college expenses (in other words, get a new in-state family). That might work.