Command All Field Labels. A Drush command that allows you to hide/show field instance labels in bulk from the command line.

cafl.drush.inc

<?php

/**
 * @file
 *  Command All Field Labels
 *
 *  Field labels can be pesky to maintain. Take control back over your field
 *  instance labels. Set field instance labels in bulk with this drush command.
 *
 *  Show a single field instance label for a specific view mode
 *   $ drush cafl body node|article|full above
 *
 *  Hide a single field instance label for a specific view mode
 *   $ drush cafl body node|article|full hidden
 *
 *  Show a field instance label shared across multiple bundles, for a view mode
 *   $ drush cafl body node|*|full above
 *
 *  Show a field instance label for a specific bundle, on all enabled view modes
 *   $ drush cafl body node|article|* above
 */

/**
 * Implements hook_drush_command().
 */
function cafl_drush_command() {
  $items = array();

  $items['cafl'] = array(
    'arguments' => array(
      'field_name' => 'The field name',
      'context' => 'Reference to the instance context ie. node|article|full',
      'state' => 'Position of the label: either hidden or above',
    ),
    'callback' => 'drush_cafl',
  );

  return $items;
}

/**
 * Drush command comamnd all field labels
 */
function drush_cafl($field_name, $context, $state) {
  list($entity_type, $bundle, $view_mode) = explode('|', $context);

  $entity_info = entity_get_info($entity_type);

  if (!in_array($state, array('hidden', 'above'))) {
    return drush_set_error(dt('State should be either hidden or above'));
  }

  if ($entity_info) {
    $bundles = array();

    if ($bundle != '*') {
      if (isset($entity_info['bundles'][$bundle])) {
        $bundles = array($bundle => $entity_info['bundles'][$bundle]);
      }
    }
    else {
      $bundles = $entity_info['bundles'];
    }

    foreach ($bundles as $bundle => $bundle_info) {
      $view_modes = array();
      $view_mode_settings = field_view_mode_settings($entity_type, $bundle);
      $view_modes = ($view_mode != '*') ? array($view_mode) : array_keys($view_mode_settings);

      foreach ($view_modes as $view_mode) {
        $actual_mode = (!empty($view_mode_settings[$view_mode]['custom_settings'])
         ? $view_mode : 'default');

        $instance = field_read_instance($entity_type, $field_name, $bundle);
        if ($instance) {
          $display = &$instance['display'][$actual_mode];
          $display['label'] = $state;

          field_update_instance($instance);

          $current_context = $entity_type . '|' . $bundle . '|'  . $actual_mode;

          drush_log(dt('Label: \'@state\' for instance \'@field\' on \'@context\''
            , array('@state' => $state, '@field' => $field_name, '@context' =>
            $current_context)), 'success');
        }
      }
    }
  }
}