访问javascript的数组包括来自config

Question

I have a config_javascript.php file that has the array of all the javascript file paths to be included in the header:

$config['js_files'] = array
 (
'car' => array
 (
   'interior' => array
   (
      'js/interior.js'   ,
      'js/table_pagination.js',
      'js/libs' 
   ),
   'exterior' => array
   (
      'js/exterior.js'   ,
      'js/table_pagination.js',
      'js/libs' 
   ),
)

then in the controller I am loading this config file and trying and trying to access the array but it doesn't seem to like it:

 $this->config->load('config_javascript', true);
 $js_files = $this->config->item('js_files','interior');

when I var_dump the array it's producing the bool(false);

Can someone please help?