There is no cure for HIV/AIDS yet, though there are drugs for controlling the progress of the disease. Please keep this in mind when searching the web. As far as sites are concerned there are many. I suggest you look at the NACO site, the WHO site and the CDC site to start with. Some URLs follow but keep in mind that a simple search of the web for HIV AIDS threw up more than 8 million references!
Try the following: www.naco.nic.in; www.cdc.gov/hiv/dhap.htm; hivinsite.ucsf.edu; www.hivatis.org; www.aids.org; www.nlm.nih.gov/medlineplus/ aids.htm; www.who.int/hiv/en.