Non related to HIV transmission. Seek medical care for cat scratches.. that's all.
This really falls under OCD and limited knowledge of HIV / AIDS, you will find it that incidental exposure rarely result in transmission-and by rare i mean almost never. Especially in the scenario mentioned, so feel at ease and try to learn the real routes & means of transmission in regards to HIV / AIDS. The virus does not lurk on door knobs and gates, ect, we all have it, this is why you never hear about people contracting like this.