I have dropped this code because I have chosen to make a custom category.php
Yes it is a group field
It was a conflict with this code when I deleted this it works fine.
function ringstedlift_add_custom_types( $query ) {
if( is_category() || is_tag() && empty( $query->query_vars['suppress_filters'] ) ) {
$query->set( 'post_type', array(
'post', 'nav_menu_item', 'lifte',
));
return $query;
}
}
add_filter( 'pre_get_posts', 'ringstedlift_add_custom_types' );