This time avoid Angeles and other whoring areas
Nah, now seriously... avoid Manila and other overpopulated, overpoluted areas. Shitty air is fatal for lungs, and a little 6 yo kid could have a hard time with that. I'm 36 and I can't bear with it!
Not sure where in Philippines you want to travel around, but the central / north west coast is nice. I liked the hundred islands near Bolinao, but I don't know if your gf is willing to sail (a bit) with her daughter. If not, Patan is not far from there and is a nice free beach. More in the north you have some old Spanish cities with nice architecture, and if you are really into advendure, go to the "mountains county", for fresh air and rice terraces and shit.
Anyway, just my two cents: avoid populated areas and try to travel SAFE.