php – get specific post – don’t show up the class

Hello,
I use this code in a div inside header.php:

<?php
$post_id = 1;
$queried_post = get_post($post_id);
echo $queried_post->post_content;
?>

The post show up in the page and also the widget title, but don’t show up the class i use in the style of widget. I need, i can not put the class in the html code.

Do you know how i can fix?
Thank you!