Withdraw bitcoin to Philippine bank account
Currently, the list of exchanges in the Philippines includes https://buybitcoin.ph/ and https://coins.ph/. Both of those allow you to sell Bitcoin and have the proceeds deposited as PHP into your bank account.

The way the process works is that you send Bitcoin from your wallet to the wallet of the Exchange, where it gets sold for PHP.

https://www.coinxchange.ph/ will be opening soon.  Disclosure: I'm an employee of CoinXchange.