Faire un menu à partir des catégories

<?php
$vocabulary = taxonomy_get_vocabulary(5); // on suppose que le vocabulaire contenant ton menu porte l'ID 4
$path = 'taxonomy_menu/'. $vocabulary->vid;
$items[] = array('path' => $path, 'title' => t($vocabulary->name),
  'callback' => 'taxonomy_menu_page', 'access' => $access,
  'weight' => $vocabulary->weight);

$tree = taxonomy_get_tree($vocabulary->vid);
$old_depth = -1;
$old_path = $path;

foreach ($tree as $term) {
  if ($term->depth <= $old_depth) {
    $slashes_to_remove = $old_depth - $term->depth + 1;
    for ($i = 0; $i < $slashes_to_remove; $i++) {
      $old_path = substr($old_path, 0, strrpos($old_path, '/'));
    }
  }
  $path = $old_path .'/'. $term->tid;
  $old_depth = $term->depth;
  $old_path = $path;
  $items[] = array('path' => $path, 'title' => t($term->name),
    'weight' => $term->weight);
}
?>