A jobless husband and depending only the monthly support from his wife mother...

The wife left him and their two kids no communication for almost 6yrs...

The husband now file kids abandonment to his wife...

In philippines, can a husband can file kids abandonment to his wife?

I am not aware of Philippines family law but it may be useful for you to check this link:
CHILD AND YOUTH WELFARE CODE OF THE PHILIPPINES - CHAN ROBLES VIRTUAL LAW LIBRARY (http://www.chanrobles.com/childandyouthwelfarecodeofthephilippines.htm)