First you need to prepare your url to accept the param in the regex:
(urls.py)
url(r'^panel/person/(?P<person_id>[0-9]+)$', 'apps.panel.views.person_form', name="panel_person_form"),
So you use this in your template:
{% url 'panel_person_form' person_id=item.id %}
If you have more than one param, you can change your regex and modify the template using the following:
{% url 'panel_person_form' person_id=item.id group_id=3 %}