array(6) {
  [0]=>
  string(10) "lists_name"
  [1]=>
  string(10) "items_name"
  [2]=>
  string(17) "lists_description"
  [3]=>
  string(17) "items_description"
  [4]=>
  string(11) "contenttags"
  [5]=>
  string(12) "contenttopic"
}