add_action('breadcrumb_main_item_loop', 'breadcrumb_main_item_loop_20200203');
if(!function_exists('breadcrumb_main_item_loop_20200203')) {
function breadcrumb_main_item_loop_20200203($item){
//echo '<pre>'.var_export($item, true).'</pre>';
?>
<span>Loop item text</span>
<?php
}
}