function Alumnos()
 {
     parent::Controller();
     $this->load->helper(array('form'));
     $menu = Menu::getInstance();
     $menu->setCurrent('default', 'alumnos');
 }
 private function __construct()
 {
     $this->menu = Menu::getInstance();
     //$this->prov = new ReWP(__DIR__ . '/../vendor/amekusa/ReWP');
     //$this->prov->exportData();
     //$this->prov->exportDB();
 }
 function Ciclosescolares()
 {
     parent::Controller();
     $this->load->helper(array('form'));
     $menu = Menu::getInstance();
     $menu->setCurrent('default', 'ciclosescolares');
 }
<?php

require_once APPPATH . 'plugins/menus/Menu.php';
// initialize the default menu, it will be shown everywhere
Menu::getInstance()->loadMenuData('default', 'default');
                <p class="title">Grupos Estudiantiles</p>
            </div>
            <div id="middle">
                <div id="left">
                    <div id="menu">
                        <?php 
echo Menu::getInstance()->buildHtml('default');
?>
                    </div>

                    <?php 
if (Menu::getInstance()->isMenuDefined('submenu')) {
    ?>
                    <div id="submenu">
                        <?php 
    echo Menu::getInstance()->buildHtml('submenu');
    ?>
                    </div>
                    <?php 
}
?>

                    <div id="content">
                        <?php 
$this->load->view($view);
?>
                    </div>
                </div>
                <div id="right">
                    right
                </div>