  <header class="main-header">
    <!-- Logo -->
      <a href="" class="logo">
          <!-- mini logo for sidebar mini 50x50 pixels -->
          <span class="logo-mini"><img src="<?php echo base_url();?>assets/images/logo.png" /></span>
          <!-- logo for regular state and mobile devices -->
          <span class="logo-lg"><img src="<?php echo base_url();?>assets/images/logo.png" /></span>
      </a>
    <!-- Header Navbar: style can be found in header.less -->
    <nav class="navbar navbar-static-top">
      <!-- Sidebar toggle button-->
      <a href="#" class="sidebar-toggle" data-toggle="push-menu" role="button">
        <span class="sr-only">Toggle navigation</span>
      </a>
	  

		
            <a href="<?php echo base_url();?>index.php/admin/logout">
            <button type="button" class="btn logout  pull-right">Logout</button></a>


    </nav>
  </header>