I will clarify the question:
Suppose I have a page in which iframe website is loaded
<!DOCTYPE html> <html> <head> <title>Винтовые сваи Сергиев Посад</title> <script src="http://code.jquery.com/jquery.js"></script> </head> <body> <iframe src="http://www.ya.ru"></iframe> </body> </html> My goal is to visually change the elements of the site, which is uploaded to the iframe, while maintaining the functionality of the site. And this could be done with jQuery, but cross-domain policy prohibits it.
What tools can I use to do this? Perhaps you will advise a PHP framework for this purpose or some other methods.