Bogus links at bottom

Hi, I have the following text at the bottom of the footer.php file. It is bogus and I don't know how it got there. When I replace it, I get a red bar complaining that the text has been removed. Can you help please? Thanks!

Please return following links to the footer:
Designed by http://ayurvedic-doctor-india.com/, thanks to: sky3ds, hcg and http://cheaptomssale.co.uk/

I can see in your download that it has the same bogus links!
<div class='smthemes'>Designed by <a href='http://ayurvedic-doctor-india.com/' target='_blank'>http://ayurvedic-doctor-india.com/</a>, thanks to: <a href='http://ywebsite123.com/' target='_blank'>sky3ds</a>, <a href='http://tameragdesign.com/' target='_blank'>hcg</a> and <a href='http://cheaptomssale.co.uk/' target='_blank'>http://cheaptomssale.co.uk/</a></div>
</div>
</div>