I just discovered it. My niece who's living in the US wanted to get her nursing degree here so I inquired. Anyone abroad who wants to study here and is planning to get a student visa, here's what to do :

Contact the Philippine university or college online and ask for a certificate showing their approval to take you in as student. Bring that certificate, and other papers as per Philippine Embassy requirement, to the Philippine Embassy there, and you get the visa.

You may get the visa here, but then you will have to go back to the US again (if you're a US citizen) to appear personally in the Philippine embassy. Foreign students can go here visa-free for 20 days, just enough to secure a student visa. I think it can be extended.

For more details, just contact the foreign affairs department online.