heh, here is how.
First u need a large tank(20g plus works best) to breed ur betta. shove it full of fake plants(floating and other). breed ur bettas and remove female. feed the male untill he cant eat anymore. continue often(every few hours) to feed ur male untill he cant eat anymore(siphon uneatten food). ull need to continue to pack him full untill the fry and too big to be eatten. the male will guard and care for the fry. he cant eat any(he will eat some weaker fry) because he has no room to eat. As they grow he will act as the alfa dog. their will be some fighting but it is possible to do this. it will take time and effort!! not a easy task