RewriteEngine on
RewriteRule ^([^/\.]+)$ /$1/ [R,L]
RewriteCond $1 !^(index\.php|images|styles|media|mail|hotels|javascript|robots\.txt|send\.php|favicon\.ico|(.*)images\.xml|(.*)gallery\.swf|(.*)media)
RewriteRule ^(.*)$ index.php/$1 [L]
RewriteRule ^([^/\.]+)/?(.*)images.xml$ /hotels/$1/media/images.xml [L]