twigfiddle.com - Fiddle 99ctsy v1 - Created on December 18, 2019 18:35

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{% set pages = [
    { name: 'green', menu: 'colors' },
    { name: 'blue', menu: 'colors' },
    { name: 'yellow', menu: 'colors' },
    { name: 'orange', menu: 'colors' },
    { name: 'magenta', menu: 'colors' },
    { name: 'frog', menu: 'animals' },
    { name: 'frog', menu: 'animals' },
] %}

{% set ul = '' %}
{% for page in pages|sort((a, b) => a.menu <=> b.menu) %}
    {% if ul == '' %} <ul> {% endif %}
    {% if ul != page.menu %} 
        {% if ul != '' %} </ul></li> {% endif %}
        {% set ul = page.menu %} 
        <li>{{ page.menu }}<ul>
    {% endif %}
    <li>{{page.name}}</li>
{% endfor %}
{% if ul != '' %} </ul></li></ul> {% endif %}

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Fiddle 99ctsy created on December 18, 2019 18:35 and visited 350 times

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