inline_keyboard url

$keyboard = array(
	"inline_keyboard" => array(array(array(
		"text" => "button",
		"url" => "http://www.google.com"
	)))
);

$keyboard = json_encode($keyboard, true);

$data = array(
	'chat_id' => $chatid,
	'text'  => $text,
	'reply_markup' => $keyboard,
	'parse_mode' => 'html',
);