Hyperlink comes up with my site

I am trying to do a hyper link and for some reason it adds part of my site so then it doesn’t work. This is very frustrating!!

http://mommascrazycoupons.com.previewdns.com/%3Ca%20href=%22http://www.petco.com/petco_page_PC_fancyfeastfreecanapr.aspx%22%20title=%22click%20here%22%3E%3C/a%3E

This is what it comes to? How do I take my name out of it???