add_filter('the_content', 'db_process_url_shortcodes');

function db_process_url_shortcodes($content) {
	
	$patterns = array(
		'#\[et_pb_button [^\]]*? button_url="([^"]+)"#',
		'#\[et_pb_image [^\]]*? url="([^"]+)"#',
	);
	
	foreach($patterns as $regex) {
		$content = preg_replace_callback($regex, 'db_process_url_shortcodes_callback', $content);
	}
	
	return $content;
}

function db_process_url_shortcodes_callback($matches) {
	
	if (isset($matches[1])) {
		
		$url = $matches[1];
		
		// URL decode brackets
		$url = str_replace('%91', '[', $url);
		$url = str_replace('%93', ']', $url);
		
		// Do shortcodes
		$url = preg_replace_callback('#\[[^]]*\]#', 'db_process_url_shortcodes_individual', $url);
		
		return str_replace($matches[1], $url, $matches[0]);
	}
	
	return isset($matches[0])?$matches[0]:'';
}

function db_process_url_shortcodes_individual($matches) {
	return isset($matches[0])?do_shortcode(urldecode($matches[0])):'';
}