// modifys contact form 7's default select value of --- to Please select...
function my_wpcf7_form_elements($html) {
	$text = 'Please select...';
	$html = str_replace('<option value="">---</option>', '<option value="">' . $text . '</option>', $html);
	return $html;
}
add_filter('wpcf7_form_elements', 'my_wpcf7_form_elements');

// Modify multiple selects
function my_wpcf7_form_elements($html) {
	function ov3rfly_replace_include_blank($name, $text, &$html) {
		$matches = false;
		preg_match('/<select name="' . $name . '"[^>]*>(.*)<\/select>/iU', $html, $matches);
		if ($matches) {
			$select = str_replace('<option value="">---</option>', '<option value="">' . $text . '</option>', $matches[0]);
			$html = preg_replace('/<select name="' . $name . '"[^>]*>(.*)<\/select>/iU', $select, $html);
		}
		add_filter('wpcf7_form_elements', 'my_wpcf7_form_elements');
	}
	ov3rfly_replace_include_blank('menu-569', 'Choose language', $html);
	ov3rfly_replace_include_blank('menu-614', 'Choose country', $html);
	return $html;
}