remove kriesi link in footer but allowing another link

Hi,

I already asked for this and you gave me an answer but I waited to have made my child theme in order to put it in practice.

And I have a problem.

When I do what you told me to do:

replace
<?php echo $copyright . $kriesi_at_backlink; ?>
by
<?php echo $copyright; ?>

I can make a link but it will open as http://www.mariage-inoui.com/www.mysitename.com.
I have used this code in footer copyright section:
© Copyright 2013 - mariage in'oui site crée par <a href="www.mysitename.com"target_blank> my name </a>

How can I make the link open as http://www.mysitename.com and not as if this link was part of the website?

Kind regards,

Delphine