For those at the back, loooong ago movies were frequently shown on a double bill. You'd get the movie you actually wanted to see, the A-movie, with a smaller film that was basically there to hitch a ride, the "B-movie". B-movies were typically low-budget or genre fair -- horror, sci fi, etc. Some B-Movies were actually so popular that they became the reason people saw the double-bill, but this was rare. The A-Movie was almost always a bigger studio production that lots of money went into.
So when they say "A B-Movie with A-Movie treatment", they mean a film that would typically be made as a cheap trashy crowd-pleaser given the treatment of a studio's intended main attraction, which often had things like "a budget" and "actors who can act".