I don't know what are their equivalent for those who studied in the Philippines.
I am not from the Philippines, but if my information is correct then there is no nation-wide matriculation examination for high school students in the Philippines. If that is indeed true there is no equivalent for
HKCEE, HKALE, GCSE, GCE A Level, IB, OAC, HSC etc.
in the Philippines. In that case I'd advise you to put your 4th year high school results there instead - perhaps what you have on your Form 138 record of studies? Or your CEE results if you have any. I'm not sure how accurate my information is, but I hope you get my drift. The main thing is to let them know you have finished high school and hence have the educational qualification for university study. Good luck!