accordian

<?php
/*
controler
*/
function accordian()
{
       $this->load->view('tes/header');
      $this->load->view('tes/main');
}

/*view header*/
<!doctype html>
<html lang="en">
<head>
  <title>my site</title>
  <meta charset="UTF-8" />
  <meta name="ROBOTS" content="ALL" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />

  <!-- Base Spider CSS -->
  <link type="text/css" rel="stylesheet" href="<?php echo base_url(); ?>assets/css/jquery-ui.min.css" />
  <!-- [END] -->
  <script src="<?php echo base_url(); ?>assets/js/jquery-1.9.1.js" type="text/javascript" charset="utf-8"  ></script>
  <script src="<?php echo base_url(); ?>assets/js/jquery-ui.min.js" type="text/javascript" charset="utf-8"  ></script>

</head>

/*view main*/
<body>
<div style='margin:auto;width:600px'>
  <div id="accordion">
    <h3><a href="#">First header</a></h3>
      <div>First content</div>
    <h3><a href="#">Second header</a></h3>
      <div>Second content</div>
  </div>
</div>
  <script>
$(function() {
    $( "#accordion" ).accordion();
});
</script>
</body>
</html>