title: How to call helper in view
body: <p>I made a helper and save it as MY_skm_helper.php,
  and call it in my view like this </p>
  
  <p><code>$this-&gt;load-&gt;helper('MY_skm');</code></p>
  
  <p>but it shows error like this:</p>
  
  <blockquote>
    <p>Unable to load the requested file: helpers/my_skm_helper.php</p>
  </blockquote>