Torn between friends

I have a really good friend named "K". Well I only hang with a few females and the other females that I hang with have a few problems with "K". I did talk to her about the problems and she said she will try to fix them. I did it without revealing who said what. Noe I have to get my other friends to see the change. How do I do it without revealing to them that I talked to her about it or revealing that they were the ones who complained. I don't want anyone mad at me and I just want us to go back to the way we were. Just friends with no hostility between anybody.