{% for nav_item in nav %}
{% if nav_item.children %}
{% for nav_item in nav_item.children %}
{{ config.site_url }}{{ nav_item.abs_url }}
{{nav_item.update_date}}
daily
{% endfor %}
{% else %}
{{ config.site_url }}{{ nav_item.abs_url }}
{{nav_item.update_date}}
daily
{% endif %}
{% endfor %}