WordPress - Change "wp-content" folder name. Change "themes" folder name. Change "plugins" folder name. Change "mu-plugins" folder name. Change "uploads" folder name. Changing the Site URL.

wp-config.php

<?php
/**
 * File: wp-config.php
 * 
 * 1. Changing the Site URL
 * 2. Change "wp-content" folder name
 * 3. Change "themes" folder name
 * 4. Change "plugins" folder name
 * 5. Change "mu-plugins" folder name
 * 6. Change "uploads" folder name
 *
 * NOTE:
	- If your website or blog is already live and serving content, be prepared for at least a couple minutes of downtime.
	- Renaming the "wp-content" folder doesn’t necessarily improve security or hide the fact that you are using WordPress.
	- All the installed plugins and themes will be deactivated in the process. You have to manually activate them after renaming the folder.
	- Sometimes deactivated themes may lose their settings. Back up settings before proceeding.
	- After renaming the folder, some plugins may not work as they should. The reason being is that the offending plugins may not be following the WordPress guidelines and have a hardcoded “wp-content” folder name.
	- On an established site or blog the old URLs are not automatically redirected to the new URL. You have to manually do that using plugins like Redirection, so I recommend you think twice before making this change on a live site.
	- You cannot move the themes folder because its path is hardcoded relative to the wp-content folder.
 * 
 * Default structure:
 * - wp-content
	- plugins
	- themes
	- mu-plugins
	- uploads
 * 
 * After this hook:
 * - public (rename old wp-content)
	- app (rename old plugins)
	- front (create new theme folder and add your new theme to this folder)
	- themes (*don't touch this folder)
	- root (rename old mu-plugins)
	- storage (rename old uploads)
 * 
 */

/** 1. Changing the Site URL */
define( 'WP_HOME', 'http://' . $_SERVER['HTTP_HOST'] . '/' ); // Website URL
define( 'WP_SITEURL', 'http://' . $_SERVER['HTTP_HOST'] . '/' ); // WordPress URL

/** 2. Change "wp-content" folder name */
define( 'WP_CONTENT_FOLDERNAME', 'public');
define( 'WP_CONTENT_DIR', ABSPATH . WP_CONTENT_FOLDERNAME );
define( 'WP_CONTENT_URL', WP_SITEURL . '/' . WP_CONTENT_FOLDERNAME );

/** 3. Change "themes" folder name */
$theme_root = WP_CONTENT_DIR . '/front'; 

/** 4. Change "plugins" folder name */
define( 'WP_PLUGINS_FOLDERNAME', 'app');
define( 'WP_PLUGIN_DIR', WP_CONTENT_DIR . '/' . WP_PLUGINS_FOLDERNAME );
define( 'WP_PLUGIN_URL', WP_CONTENT_URL . '/' . WP_PLUGINS_FOLDERNAME );

/** 5. Change "mu-plugins" folder name */
define( 'WPMU_PLUGINS_FOLDERNAME', 'root');
define( 'WPMU_PLUGIN_DIR', WP_CONTENT_DIR . '/' . WPMU_PLUGINS_FOLDERNAME );
define( 'WPMU_PLUGIN_URL', WP_CONTENT_URL . '/' . WPMU_PLUGINS_FOLDERNAME );

/** 6. Change "uploads" folder name */
define ( 'WP_UPLOADS_FOLDERNAME', 'storage' );
define ( 'UPLOADS', WP_CONTENT_FOLDERNAME . '/' . WP_UPLOADS_FOLDERNAME );