add_filter('yith_wcwl_positions', 'only_show_to_logged_in_user');
function only_show_to_logged_in_user($so_array=array()){
if(!is_user_logged_in()){
$so_array   =   array(
"shortcode" => array("hook"=>'', 'priority'=>0)
);
}
return $so_array;
}