There are lots of Religion in the Philippines, Roman Catholic and Islam. Catholics or Christian has many kinds, Christianity spread on Philippines it's because of Ferdinand Magellan that came from Spain and influenced Philippines about the Catholic religion.
Religion in the Philippines are not new at all but an adaptation. we will see in the line of history that ever since before the Spaniards came in our country we have already a religion - monotheism as what we call it. Our ancestors believed in one God (Bathala) and nature spirits (Anitos). But these beliefs were replaced by Christanity, which, was really related to what they believed. Bathala was replaced by Jesus as God and Anitos was replaced by Saints.