This university for sure has one. Here is the link.
LVN to RN/BSN Option
This is in San Rafael, not SF. 30 minutes north of the golden gate. Beautiful university, pricey, nice area, private and recently became part of the UC system of California.)
(This may help you since you are an LVN. You should research this here. This program is most likely the most difficult to get into due to the price and its location. I was wait listed here and I was a full time student with a 3.5 when I applied. But, that was for the school of nursing, BSN...if this is a bridge, it might not be as competitive)
(I think these guys have a bridge if I am not mistaken. I was an anatomy TA here for a couple of years. Buuuuut it's been 3 years since then, sooo I'm not sure if my memory is correct. But, you can check out the LVN and their RN program here.
I'm sure there are other nursing schools who have bridge programs, but they are nt directly located within the city of SF. You might have to travel. The first school I listed is 30 minutes outside of the city and north. Buuut, it is gorgeous over there and you are a hop skip and jump to the GGB and the city. SRJC is a great junior college up north as one person said. You might also check out SJSU in San Jose.