{% load i18n %}
<style type="text/css">
#main-sections ul li {width: {{ section_width }}px;}
#main-sections ul li a {width: {{ section_width|add:"-10" }}px;}
.levelth {width: {{ section_width }}px;}
</style>
{% url 'catalogue_lessons' as les %}
<ul class="section-buttons">
{% for level in object_list %}
<li class="box{{ level.pk }}">
    <a href="{{ les }}#{{ level.slug }}">
    <span class="in-box">
    <span class="name">{{ level }}</span>
    {{ level.length_synthetic }} lub {{ level.length_course }} godzin
    </span>
    </a>
</li>
{% endfor %}
</ul>