CTF-site-project/templates/utils/_mainsidenav.html

<div class="navigation capsule-window">
    <div class="decore1"></div>
    <nav class="navlink">
        <a href="{{ url_for('index') }}" class="link">На главную</a>
{%- for link, text in (
    ('web', 'Web'),
    ('forensic', 'Форензика'),
    ('osint', 'OSINT'),
) %}
    {%- 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>