SearchController.php

$remove = array();
    foreach($company_names as $company_name) {
      $remove_name = false;
      foreach($company_names as $compare) {$remove_name = $remove_name || (strpos($compare, $company_name) == 0);}
      if ($remove_name) {$remove[] = $company_name;}
    }
    $company_names = array_diff($company_names, $remove);