MyProject/app/views/main_view.php

<div class="row mt-3">
    <div class="col-6">
        <h1>Блог</h1>
    </div>
    <div class="col-6 text-end">
        <?=$_SESSION['user']['login']; ?>
        <a href="/user/logout">Выход</a>
    </div>
</div>