Your Welcome Peter
Just let your girlfriend go to the Local City Registrars Office and bring the supplemental documents(baptismal cert,school records,drivers license etc etc) and they will decide if there's a need for a lawyer+court hearing.
try to read this link Republic Act 9048(clerical error law)..
http://www.census.gov.ph/data/pressr.../pr0127tx.html
http://www.census.gov.ph/data/civilr...ra9048.html#Q6