“Latest Media” – Database Prefix

Hey guys

I’m currently having a problem. I changed my database prefix in order to make it more safe. I forgot that some files still use the wp_ prefix.
It worked  out so far and I could change  everything needed to the new prefix but can’t find where I can change it for the “Gallery” (Footer -> Latest Media)
What I mean:
Theme Options -> Footer -> Gallery Category

Can’t sellect anything there cause there is no “wp_xyz” anymore. Where can I find it?