I would suggest better you do it yourself in processing the application of the your wife's visit visa. Quite easy if you have all the requirements and if you're qualified enough to sponsor you wife. Minimum salary requirement for family visit visa is @ 5k QR and 7K QR for family residence visa ( includes basic sal + hse allowance). And take note to have you marriage cert authenticated by the DFA in phils by then it can only be accepted for attestation in phil embassy here.  All the best of luck!