Hello, i'm french so sorry for my english.
on my website www.photomoto07.fr/galerie , if i clic on the banner, stay on www.photomoto07.fr/galerie , but i would be redirect to www.photomoto07.fr
I can not find the file to modify.
I used zenphoto 1.4.6 with the theme zpMasonry.
Thanks for all, and i hope that you have understood me

The easiest would probably be something like this:

First, in Options -> Gallery fill in the fields for Website title and Website url.

Then in inc-header.php locate this code:
">

and change it to:

">

Thank you for the quick response, it works wonderfully, you're the best.
-B