Even if actual "divorce" is not legal in the Philippines, we already have it, or at least for those who can afford the high costs it requires.
Annulment (due to mental incapacity) has been used for many many year in the Philippines in lieu of divorce. It requires a psychologist to formally submit his findings regarding the couple and that will be used by the lawyers to be submitted to court so the marital contract will be declared null and void.
All that requires quite a bit of money and lots of time (up to two years) for the whole process to be completed.