MicroFrameWork/kernel/modules/admin_themes/views/index.php

<?php
/**
 * @var $json string
 */

use kernel\models\Option;


$table = new \Itguild\Tables\ListJsonTable($json);
$table->columns([
    'preview' => function ($data) {
        return "<img src='$data' width='200px'>";
    }
]);
$table->addAction(function ($row, $url){
    $path = $row['path'];
    $active_admin_theme = Option::where("key", "active_admin_theme")->first();
    $btn = "<a class='btn btn-primary' href='$url/activate/?p=$path' style='margin: 3px; width: 150px;' >Активировать</a>";
    if ($path === $active_admin_theme->value){
        $btn = "Активна";
    }

    return $btn;
});
$table->create();
$table->render();