Thx,
Should i use it this way ?
add_filter(‘wdm_before_fetch_template’,’my_fetch_template’,10,1);
and then
function my_fetch_template($vars) {
$vars['file_list'] = "tag value";
$vars['my_custom_file_list'] = callback_function();
// code to customize how file_list is rendered
return $vars;
}