As there are many questions about divorce and always the same answers that it is impossible in the Philippines, I put the the official text from the Family code :
Art. 26. All marriages solemnized outside the Philippines, in accordance with the laws in force in the country where they were solemnized, and valid there as such, shall also be valid in this country, except those prohibited under Articles 35 (1), (4), (5) and (6), 3637 and 38. (17a)
Where a marriage between a Filipino citizen and a foreigner is validly celebrated and a divorce is thereafter validly obtained abroad by the alien spouse capacitating him or her to remarry, the Filipino spouse shall have capacity to remarry under Philippine law. (As amended by Executive Order 227)
This second paragraph applied also when the marriage happened in the Philippines.... Two of my friends (French) divorced even though they were married in the Philippines. There ex wives were able to marry again...
Of course it is the foreigner who has to file the divorce in his own country.