CTF-site-project/templates/_sidenav.html

<div class="navigation divv">
    <div class="decore1"></div>
    <nav class="navlink">
        <a href="{{ url_for('index') }}" class="link">на главную</a>
{% for link, text in (
    ('sql', 'sql пипка'),
    ('found', 'forensic'),
    ('decode', 'encode and decode'),
) %}
    {% if request.path != url_for(link) %}
        <a href="{{ url_for(link) }}" class="link">{{ text }}</a>
    {% endif %}
{% endfor %}
{#        <!--    <a href="">rfi</a>--> #}
{#        <!--    <a href="">lfi</a>--> #}
    </nav>
</div>