Integrate multisite WordPress into CakePHP

I have Integrate WordPress into CakePHP and its working fine. now I want to Integrate multisite WordPress into CakePHP and that’s creating some problem for me.

I have two site(multisite wordpres) like:

1)http://yoursite.com/blog

2)http://yoursite.com/blog/help

for that I have set wp-config.php:

define( 'MULTISITE', true );
define( 'SUBDOMAIN_INSTALL', false );
$base = '/app/webroot/blog/';
define( 'DOMAIN_CURRENT_SITE', 'yoursite.com' );
define( 'PATH_CURRENT_SITE', '/app/webroot/blog/' );
define( 'SITE_ID_CURRENT_SITE', 1 );
define( 'BLOG_ID_CURRENT_SITE', 1 );

and .htaccess

RewriteEngine On
RewriteBase /app/webroot/news/
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule  ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]
RewriteRule  ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]

So here first one working fine but getting problem with second one. any idea please!