San Diego is full of  family friendly diniing spots. 

The Cheesecake Factory in Fashion Valley will give your child a special plate of sliced bananas and bread if you request a highchair (otherwise you just have to ask for the plate of goodies).

Wahoo's - A great place to eat with children.  Wahoo's has grown from a San Diego taco stand to a national chain with sseveral locations throughout San Diego County.  There are usually tons of kids and they all LOVE the food!  You can't come to San Diego without trying a fish taco, and this is the best place to have them.  They also have a lot of other tasty menu items, like their Chicken bowl and burritos.

Corvette Diner- formerly in Hillcrest (mentioned in Family Travel) but now in Liberty Station at 2965 Historic Decatur Road, is a fun place to go with kids- it's a fifties themed diner with dressed up servers, loud music and good diner food.  The sassy servers throw straws and bubble gum on the tables and the kids go nuts!