$comment_content = str_replace('<br>', '<br />', $comment_content);
$comment_content = str_replace('<hr>', '<hr />', $comment_content);
$comment_content = $wpdb->escape($comment_content);
$comment_content = str_replace('<br>', '<br />', $comment_content);
$comment_content = str_replace('<hr>', '<hr />', $comment_content);
$comment_content = $wpdb->escape($comment_content);