我创建了带有字段组的表单。下面是print_r（$ form）;
的输出 [#groups] => Array
(
[group_systems] => stdClass Object
(
[id] => 4
[identifier] => group_systems|node|application|form
[group_name] => group_systems
[entity_type] => node
[bundle] => application
[mode] => form
[parent_name] =>
[table] => field_group
[type] => Normal
[export_type] => 1
[disabled] =>
[label] => Systems
[weight] => 4
[children] => Array
(
[0] => field_can_you_accept_xml_format_
[1] => field_have_you_reviewed_the_shut
[2] => field_what_is_the_level_of_effor
[3] => field_is_there_internal_it_suppo
[4] => field_what_is_your_incoming_band
[5] => field_is_there_a_redundancy_reco
[6] => field_do_you_have_a_test_environ
)
[format_type] => tab
[format_settings] => Array
(
[formatter] =>
[instance_settings] => Array
(
[classes] =>
[id] =>
[description] =>
[required_fields] => 1
)
)
[array_parents] => Array
(
[0] => group_systems
)
[collapsible] => 1
[collapsed] =>
[classes] => collapsible required-fields
[description] =>
)
)
如何分别渲染/显示字段组元素，而不是渲染整个组。例如：如何在我的custom-node-form.tpl.php
中呈现/显示字段field_can_you_accept_xml_format_