how to get open share public facebook groups

hi all i am web developper and i want to develop a script to get public facebook groups but only with non admin post approval, i took a look at facebook graph api and found nothing helpful for my problem also tried to check if there is somthing to find in mbasic html page that indicate that and nothing also, if someone has some method share with us or contact me to do work together and i will program an auto scraping script