Customise WordPress admin menus

class-admin-menus.php

<?php

class Admin_Menus extends Presi_Core_Class

	/**
	 * Keep track of which admin menu separator we are adding
	 * @var int
	 */
	private $separator_index = 0;

	public function __construct()
	{
		//custom admin menu order
		$this->add_action('admin_menu', 'custom_admin_menus', 99);
	}

	public function custom_admin_menus()
	{
		//remove link manager menu
		remove_menu_page('link-manager.php');

		//remove theme customisation submenu
		if( !current_user_can('switch_themes') )
			remove_submenu_page('themes.php','themes.php');

		//add extra separators if required
		//need to add in pairs if they are next to each other as WP dedups
		//position as required in custom_menu_order method
		$this->add_admin_menu_separator(900);
		$this->add_admin_menu_separator(901);

		//custom menu order
		add_filter( 'custom_menu_order', '__return_true' );
		$this->add_filter('menu_order', 'custom_menu_order' );
	}

	/**
	 * Add a menu separator
	 * @see http://wordpress.stackexchange.com/questions/2666/add-a-separator-to-the-admin-menu
	 *
	 * @param $position
	 */
	public function add_admin_menu_separator($position)
	{
		global $menu;
		if( ! $this->separator_index )
		{
			foreach($menu as $section)
			{
				if (substr($section[2],0,9)=='separator')
					$this->separator_index++;
			}
		}
		$this->separator_index++;
		$menu[$position] = array('','read',"separator{$this->separator_index}",'','wp-menu-separator');
		ksort( $menu );
	}

	/**
	 * Custom admin menu order
	 *
	 * @param $menu_ord
	 *
	 * @return array|bool
	 */
	public function custom_menu_order($menu_ord)
	{
		$new_order = array(
			'index.php', // Dashboard
			'presi_tools', // Dashboard
			'jetpack',
			'wp-help-documents',
			'separator1', // -------------------------
			'edit.php?post_type=page', // Pages
			'edit.php?post_type=hidden_page', //Hidden pages custom post type
			'upload.php', // Media
			'edit.php', // Posts
			'edit-comments.php', // Comments
			'gf_edit_forms', //Gravity Forms
			'edit.php?post_type=testimonials-widget',
			'separator2', // -------------------------
			'edit.php?post_type=custom_post_type',
			'separator', // -------------------------
			'themes.php', // Appearance
			'genesis',
			'plugins.php', // Plugins
			'users.php', // Users
			'tools.php', // Tools
			'options-general.php', // Settings
			'separator-last', // -------------------------
		);

		$leftovers = array_diff( $menu_ord, $new_order );
		return array_merge( $new_order, $leftovers );
	}
}