It's been a long time since I've visited the Malacanang Palace. When the tour was still free and you get to visit the rooms of the Marcoses, including the Ceremonial Hall, Heroes Hall, etc.
Now, the Palace is no longer open to the public. Instead, a Presidential Museum and Library was established in the nearby Kalayaan Hall, which is just beside the Palace, where memorabilia from the former Presidents are displayed. It is no longer free (P50) and you have to set up an appointment 7 working days prior to the visit.
For those who are interested in visiting the museum, I have attached the request form. Just print and fill it up and email it to the firstname.lastname@example.org