You must first go to the Pakistan Consulate or Embassy in your area to obtain the proper information. The general information is that you must have Original Philippines passport with at least 6 months of remaining validity. You need to fill in the Visa application form and must provide 2 photographs. To check complete information of Pakistan Embassy in Philippine, click here
Requirements for filipino citizen to obtain to enter pakistan
Because they are fathers of guest 1.
I think you don't need to get a visa to pakistan ... I advised you don't go there because many of them are donkey.....