There are two centers that I know of offer several life support trainings in Manila: Philippine National Red Cross and Philippine Heart Center.
The Philippine National Red Cross has several chapters that caters all over Philippines. After the said training, you can be a volunteer under them. The training is usually a week long that starts from Monday to Saturday, 8am to 5pm except on Saturday (half day).
The Philippine Heart Center in Quezon City offers Basic Life Support trainings through Critical Care Nuses Association of the Philippines, Inc. (CCNAPI). For more details, visit http://ccnapi.multiply.com/.
There is one center, however, as I have been browsing online that claimed their trainings are accredited by AHA. It is the Emergent Medical Training Center for Asia, an authorized provider of the American Heart Association courses in BLS, ACLS and PALS in the Philippines.
I have never heard any feedback about this center. Take a look at their courses fees, very dear! Basing on the fees, people will expect that the trainings are at par with the US and the certificates that will be received can be used elsewhere. I will also expect that after all the trainings, I am highly skilled in performing life suport to people. For those of you who have undergone in this center, please share your experience.