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_pages to generate the second dimension of the trail
  • $id(id)(optional) The ID of the post this breadcrumb is for