Knockout-Lite/app/BbCode/Tag/Blockquote.php

<?php

namespace App\BbCode\Tag;

use Knockout\BbCode\Tag\SimpleTag;

class Blockquote extends SimpleTag
{
    public function getCloseHtmlTag() : string
    {
        return '</div>';
    }

    public function getOpenHtmlTag() : string
    {
        return '<div class="blockquote">';
    }

    public function getTag(): string
    {
        return 'blockquote';
    }
}