function your_function_name($title, $term, $field, $post_id) {
$ancestors = get_ancestors($term, $term->taxonomy, 'taxonomy');
if (!empty($ancestors)) {
$parts = array();
array_reverse($ancestors)
foreach ($ancestors as $ancestor) {
$ancestor_term = get_term($ancestor, $term->taxonomy);
$parts[] = $ancestor_term->name;
}
$parts[] = $term->name;
$title = implode(' => ', $parts);
}
return $title;
}
