This filter is applied within the bcn_breadcrumb_trail_multidim and bcn_breadcrumb_trail_multidim_children classes in the post_parents() and do_post() functions. This filter was introduced in version 2.0 with two parameters. It receives two parameters:
- $args – (string)(required) The argument string to be sent into
wp_list_pagesto generate the second dimension of the trail - $id – (id)(optional) The ID of the post this breadcrumb is for