elvisblogsorg

<?php
function themename_child_terms($vid = 1) {
  if((arg(0) == 'taxonomy' && arg(1) == 'term') || (arg(0) == 'node' && is_numeric(arg(2)))) {

        if(arg(0) == 'term') {
            $children = taxonomy_get_children(arg(2), $vid); // does this term have children?
                if(!$children) {
                $custom_parent = taxonomy_get_parents(arg(2));
                  $parent_tree = array();
                  foreach ($custom_parent as $custom_child => $key) {
                        $parent_tree = taxonomy_get_tree($vid, $key->tid);
                  }
                  $children = $parent_tree;
                }
        }
        else { // we are on a node page
                $n = node_load(array('nid' => arg(2)));
                $children = taxonomy_node_get_terms_by_vocabulary($n, $vid);
        }

    $output = '<ul>';
    foreach ($children as $term) {
      $output .= '<li>';
      $output .= l($term->name, 'taxonomy/term/' . $term->tid);
      $output .= '</li>';
    }
    $output .= '</ul>';

    return $output;
  }
}
?>