Attorneys fees when I did it included the application for the Habeus Corpus .. they fill in the details your bf gives, take it to Court of Appeals nearest to where he lives and wait for a date. Cost me around 45,000 pesos total but obviously varies on Attorney charges.
I applied in April this year and was in Court May, approx 5-6 weeks (again depends on Court schedules). If the paperwork is received by the mother (respondant), she signs to say she got it and has no choice but to appear and bring the child with her (you can look up Habeaus Corpus on the internet for the full guide on what it is and how it works). I do believe I remember at the time my Attorney saying if my wife signed and did not appear she can be arrested and forced to appear (don't quote me on it) ...
The court will not normally dismiss Habeus Corpus.
My wife told Court she did not want me to have visits, the 3 Judges sitting said it is against the law to deny access to the minor child by the father, so basically he has the same rights as me.
Good luck with this, I hope everything goes well for him