Advanced/Basic Menu & Workflow for Wordpress Admin

functions.php

<?php

//Add in a customized Wordpress admin workflow for a simplified experience
function edit_admin_menus() {

    //Set this as what ever you want the default admin landing page to be
    $redirect = 'edit.php?post_type=page'; //Pages
    $defaultURL = get_option( 'siteurl' ) . '/wp-admin/' . $redirect;

    //Add/remove cookies/redirects
    if ( isset( $_GET['wp-advanced'] ) ) {
        if ( $_GET['wp-advanced'] == 0 ) {
            setcookie( 'wp-advanced', 0, time() - 86400 );
        } else {
            setcookie( 'wp-advanced', 1, time() + 86400 );
        }
        unset( $_GET['wp-advanced'] );
        wp_redirect( $defaultURL );
    }

    //Remove these links from the menu no matter if advanced or not
    remove_menu_page( 'index.php' ); //Dashboard
    remove_menu_page( 'link-manager.php' ); //Links
    remove_menu_page( 'edit-comments.php' ); //Comments
    remove_menu_page( 'tools.php' ); //Tools

    //Remove these links if user is editor
    if ( !current_user_can( 'activate_plugins' ) ) {
        remove_menu_page( 'profile.php' ); //Profile Page
    }

    //Redirect if user tries to go to Dashboard
    if ( preg_match( '#wp-admin/?(index.php)?$#', $_SERVER['REQUEST_URI'] ) ) {
        wp_redirect( $defaultURL );
    }

    //Set up the basic/advanced link properly
    $getrequest = strpos( $redirect, '?' );
    if ( $getrequest !== false ) {
        $pageURL = $redirect."&wp-advanced=";
    } else {
        $pageURL = $redirect."?wp-advanced=";
    }

    if ( !isset( $_COOKIE["wp-advanced"] ) ) {

        //If the user is in Basic (default) mode, strip the following pages:
        remove_menu_page( 'update-core.php' ); //Updates
        remove_menu_page( 'plugins.php' ); //Plugins
        remove_menu_page( 'tools.php' ); //Tools
        remove_menu_page( 'options-general.php' ); //Settings
        remove_menu_page( 'users.php' ); //Users
        remove_menu_page( 'themes.php' ); //Themes

        //Since we removed themes menu, add the navigation menus button back as a main menu item
        add_menu_page( 'Change Menus', 'Menus', 'add_users', 'nav-menus.php', '', 'div', 6 ); //Move Nav Menu

        //Add the Advanced button at the bottom
        $pageURL .= "1";
        add_menu_page( 'Switch to Advanced Menus', 'Advanced Menu', 'add_users', $pageURL );

    } else {

        //Add the Basic button at the bottom
        $pageURL .= "0";
        add_menu_page( 'Switch to Basic Menus', 'Basic Menu', 'add_users', $pageURL );

    }

}

add_action( 'admin_menu', 'edit_admin_menus', 999 );

//Add in custom Wordpress 3.8 icons for our Advanced/Basic Menu
function custom_menu_icons() {
    echo '<style type="text/css">
    .toplevel_page_nav-menus div.wp-menu-image:before{content: "\f333";}
</style>';
}

add_action( 'admin_head', 'custom_menu_icons' );

?>