
You can do one of two things…
1) Buy yourself a standard US to Philippines plug adapter from and travel/department store and use that.
2) Buy yourself the Apple World Travel Kit.
Electrically the MacBook's power adapter will be fine as it is capable of handling 100-240V. While the first option is probably simpler and allows you to use other electrical devices the second option is "prettier" as it's a collection of the white adapter plugs that goes straight into your MacBook adapter.
One thing I do recommend is you get yourself a laptop surge protector like the
APC Notebook Surge Protector.