display just the label from node_lode()
If you want to find the label for a specific field then you can use field_info_instance()

https://api.drupal.org/api/drupal/modules!field!field.info.inc/function/field_info_instance/7

&lt;?php
$field_instance = field_info_instance('node', 'field_body', 'article');
$label = $field_instance['label'];
?&gt;


However, the titles are available in the rendered node if they are not hidden in your view mode, and can accessed like :

&lt;?php
$node  = node_view(node_load($nid));
$label = $node['field_body']['#title'];
?&gt;