Forum:Any way to make link caption invisible?

I found an interesting topic about CSS tooltip here, and installed the codes by Sovq on my wiki. It's perfectly working as I wished, but when I wrap an internal link: Forum:Support Requests Tooltip text  it displays an another tooltip(link caption) beside the CSS one. (here's a Screenshot.) So this time, I tried ajax tooltip code but it didn't even work.

For now, I'm using a simple trick to not have this doubled caption:  Forum:Support Request Tooltip text But this seems not to be the proper way to solve the problem and I wouldn't like to make templates out of this. Please point me the right way.