This filter is applied within the bcn_breadcrumb class in the set_template member function before passing into wp_kses() and then setting the internal $template property. This filter was introduced in 4.4. It receives three parameters:
- $template – (string)(required) The template that is being set for the breadcrumb
- $type – (array)(optional) The array of type strings for the breadcrumb
- $id – (int|NULL)(optional) The ID of the resource represented by the breadcrumb, will be NULL if no suitable ID exists