<?php
// split out taxonomy terms by parent
// $tree =
// ( 'Audi' =>
//      ( '100' =>
//          ( '1.8LS' => (1968, 1969, 1970)
//          ( '1.9LS' => (1971, 1969, 1970)
//      )
// )

// $thismake - 'Audi'
// $models - ( '100', ('1.8LS' => (1968, 1969, 1970), '1.9LS' =>
//(1971, 1969, 1970) ) )
//   $thismodel becomes '100'
//   $engines - ('1.8LS' => (1968, 1969, 1970)
//       $thisengine becomes '1.8LS'
//       $years - (1968, 1969, 1970)

function bowwowtheme_liquid_print_terms($nid) {
 $links = array();
 $processed = array();
 $tree = array();

 $terms = taxonomy_node_get_terms($nid);

 if($terms){
   foreach($terms as $term){
     $parents = taxonomy_get_parents_all($term->tid);

     if (in_array($parents[0]->tid, $processed)){
         continue;
     } else {
       $processed[] = $parents[0]->tid;
       array_reverse($parents);
       if (4 == count($parents)) {
         $tree[$parents[0]->name][$parents[1]->name][$parents[2]->name][]= $parents[3]->name;
       } else if (3 == count($parents)) {
         // handle the VW case
        $tree[$parents[0]->name][$parents[1]->name][]= $parents[2]->name; 
       }
     }
   }
   // printing
   foreach ($tree as $thismake => $models) {
     print $thismake . " - ";
     foreach ($models as $thismodel => $engines) {
       print $thismodel . " - ";
       foreach ($engines as $thisengine => $years) {
         print $thisengine . " - ";
         foreach ($years as $yr) { print $yr . ", "; }
       }
     }
   }
 }
}
?>