Repeatable Form Field for Joomla
<field name="myrepeatfield"
type="Repeatable"
icon="list"
description="Field Description here"
label="Field Label Here"
default="">
<fieldset hidden="true" name="myrepeatfield_modal" repeat="true">
<field name="customfield1"
label="Custom Field One"
size="30"
type="text" />
<field name="customfield2"
label="Custom Field Two"
size="30"
type="textarea" />
</fieldset>
</field>