Message: Call to undefined method CI_Input::manufacturer()
<p>can somebody tell me what's wrong with this code? This is located in my controller. I have an error message "Message: Call to undefined method CI_Input::manufacturer()"</p>

<pre><code>public function edit_manufacturer(){
  $this-&gt;load-&gt;helper("security");
  $id = $this-&gt;uri-&gt;segment(3);
  if($this-&gt;input-&gt;manufacturer('submit')){
    $manufacturer_name = $this-&gt;security-&gt;xss_clean($this-&gt;input-&gt;manufacturer('manufacturer_name'));
    $this-&gt;asset_model-&gt;edit_manufacturer($manufacturer_id, $manufacturer_name);
  }
}
</code></pre>