By default the Div Framework navigation logo links to the home page, but if you want to redirect it to a custom link you would add this filter in the functions.php of your child theme.
/**
* REDIRECT NAVIGATION LOGO
* Used to redirect the navigation logo to a custom link
*/
add_filter( 'nav_logo', function($s){
$pattern = "/(?<=href=(\"|'))[^\"']+(?=(\"|'))/";
return preg_replace($pattern,$new_url,$s);
});