What are the reasons which cause "cystitis cystica glandularis" not be cured in bladder and ureters?and is there a certain way to stop its multiply?

Diffuse?: This is a common benign incidental change in the bladder mucosa. A patch or two of cystitis glandularis is no reason to be concerned. When it is widespread ("diffuse"), it generally means that there's underlying disease in the urinary tract / ureters. You indicate you have hydronephrosis. It is a marker for the need for cancer vigilance ; perhaps contains mutations that keep it going.