<?php
defined('BASEPATH') OR exit('No direct script access allowed');

session_destroy();

class Login extends CI_Controller {


    public function index()
    {
        $this->template->show('login');

    }
...}

<h2>Login</h2>

<p>
<?php



error_reporting( error_reporting() & ~E_NOTICE );
echo $myError;
?>
</p>

<form action="<?= site_url("Login/loginFunc")?>" method="post" accept-charset="utf-8">
<fieldset>
<legend>Login credentials</legend>
<label for="username">Username:</label> <br>
<input type="text" name="username" value="" id="username"  />
 <br>
<label for="password">Password:</label> <br>
<input type="text" name="password" value="" id="password"  />
 <br>
<input type="submit" name="loginsubmit" value="Submit"  />
</fieldset></form>
<br>

<?php

if(isset($_SESSION["accesslevel"])){
    $outPut = "Logout";
}
else{
    $outPut = "Login";
}

?>


<ul>
  <li><a href="<?= site_url("/Home"); ?> ">Home</a></li>
  <li><a href="<?= site_url("/Members"); ?> ">Members</a></li>
  <li><a href="<?= site_url("/Admin"); ?> ">Admin</a></li>
  <li><a href="<?= site_url("/Login"); ?> "><?php echo $outPut ?></a></li>
</ul>

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

  // start the session
if(isset($_SESSION)){
    session_start();
  }

class Navigation extends CI_Controller {

    public function index()
    {
        $this->template->show('navigation');
    }

}