<IfModule mod_rewrite.c>
   RewriteEngine on
   RewriteCond $1 !^/bookmark_master/
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
   RewriteRule    ^$ app/webroot/    [L]
   RewriteRule    (.*) app/webroot/$1 [L]
</IfModule>