there really isn't anything that can cure split ends permanently, really the only option is to get it cut, but that doesn't get all the hair (like if you had layers or something) but a product that seems to work really well is the split ender. It's pretty much a device that you sandwich sections of the hair like a flat iron or something and you pull it through your hair, when it comes to the split end, it will gently pull it off and take off the brittle end. It takes a hardly noticable length off the end and leaves the healthy hair so you don't have to chop off the healthy hair. I'm probably going to purchase it in a few days (i'm short on funds at the moment

) but i have friends that have one and it seems to work great for them!
hope this helps!