Problem with view editing

Hello, i'm having this problem:

When i make a change in any view in the backend and i save it, automatically the code makes a strange thing, it puts this \ everywhere.
Here's an example: defined(\'_JEXEC\') or die(\'Restricted access\');

What happens then in the frontend is that it gives me this error:
Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING in /home/tangram0/public_html/Extensiones_Demo/Joomla3/templates/protostar/html/com_hikashop/product/show_default.php on line 9

I'll appreciate any help.

Thanks.