<?php
class citic {
    public function __construct(){
        add_action('admin_init',array(&$this,'admin_init'));
        add_action('admin_head',array(&$this,'admin_head'));
        add_action('admin_head',array(&$this,'admin_menu'));
    }
    public function admin_init(){
        wp_enqueue_script('jquery');
    }
    public function admin_head(){}
    public function admin_menu(){
        add_submenu_page('themes.php', 'CI Theme Installer', 'Add Themes', 'install_themes','ci-theme-installer',array(&$this,'installer_page'));
    }
    public function installer_page(){
        echo '<h1>test</h1>';
    }
}

$citic = new citic();
?>