How can I render a template to grap the html from witihn a helper?

Hi,

I would like to render a view to grap (for seo) the content to generate keywords.

App::uses('AppHelper', 'View/Helper');

class MetaHelper extends AppHelper {

   function getMetas($template){

      $content = $this->render($template);

returns my this error: 

Method MetaHelper::render does not exist 

How else can I do this?

Thanks!!

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