Change WP Directory Names

alternate_themes_dir.php

<?php
/**
 * Plugin Name: Alternatives Themes Dir
 * Plugin URI: http://unserkaiser.com
 * Description: Changes the themes directory to <code>/apps</code>
 * Version: 0.1
 * Author: Franz Josef Kaiser
 * Author URI: http://unserkaiser.com
 */
// Prevent loading this file directly - Busted!
if( ! class_exists('WP') ) 
{
	header( 'Status: 403 Forbidden' );
	header( 'HTTP/1.1 403 Forbidden' );
	exit;
}



function register_apps_folder()
{
	register_theme_directory( 'apps' );
}
add_action( 'plugins_loaded', 'register_apps_folder', 0 );

wp_config.php

<?php
// !IMPORTANT! Must be set in wp-config.php

/** Absolute path to the WordPress directory. */
if ( ! defined( 'ABSPATH' ) )
	define( 'ABSPATH', dirname( __FILE__ ).'/' );

define( 'HOST_NAME ',			'example.com' );

define( 'WP_SITEURL',			'http://'.HOST_NAME );
define( 'WP_HOME',			'http://'.HOST_NAME );

define( 'WP_CONTENT_FOLDERNAME',	'content' );
define( 'WP_PLUGINS_FOLDERNAME',	'/pluuugins' );
define( 'WP_MUPLUGINS_FOLDERNAME',	'/mu-pluuugins' );

define( 'WP_CONTENT_DIR',		ABSPATH.WP_CONTENT_FOLDERNAME );
define( 'WP_CONTENT_URL',		WP_SITEURL.'/'.WP_CONTENT_FOLDERNAME );

define( 'WP_PLUGIN_DIR',		WP_CONTENT_DIR.WP_PLUGINS_FOLDERNAME );
define( 'PLUGINDIR',			WP_CONTENT_FOLDERNAME.'/'.WP_PLUGINS_FOLDERNAME );
define( 'WP_PLUGIN_URL',		WP_CONTENT_URL.WP_PLUGINS_FOLDERNAME );

define( 'WPMU_PLUGIN_DIR',		WP_CONTENT_DIR.WP_MUPLUGINS_FOLDERNAME );
define( 'WPMU_PLUGIN_URL',		WP_CONTENT_URL.WP_MUPLUGINS_FOLDERNAME );