Simple MVC

/** Model (../models/Category.php)*/
<?php
class Category
{
    public static function getList()
    {
        try
        {
            $db = Db::getConnection();

            $categories = $db->prepare("SELECT * FROM categories");
            $categories->execute();

            return $categories->fetchAll(PDO::FETCH_ASSOC);
        } catch (PDOException $err)
        {
            die("I can't get category list, because " . $err->getMessage());
        }
    }
}
?>

/** Controller (../controllers/AdminController.php)*/
<?php
class AdminController
{
    public function actionIndex()
    {
        $categories = Category::getList();

        require_once ROOT . '/views/pages/admin/admin.php';

        return true;
    }
}
?>

/** Somewhere in View */

...
<?php foreach ($categories as $category): ?>
    blablabla <?=$category['category_name']; ?>
    blablabla
<?php endforeach; ?>
...