ckeditor_settings.module

<?php

function ckeditor_settings_element_info_alter(&$types) {
  if (!empty($types['text_format']['#pre_render'])) {
    $types['text_format']['#pre_render'] = array_diff($types['text_format']['#pre_render'], array('ckeditor_pre_render_text_format'));
  }
  $types['text_format']['#pre_render'][] = 'ckeditor_settings_ckeditor_pre_render_text_format';
}

/**
 * This function creates the HTML objects required for CKEditor.
 *
 * @param $element
 *   A fully populated form element to add the editor to.
 * @return
 *   The same $element with extra CKEditor markup and initialization.
 */
function ckeditor_settings_ckeditor_pre_render_text_format($element) {
  static $init = FALSE;
  if (!isset($element['#format'])) {
    return $element;
  }

  module_load_include('inc', 'ckeditor', 'includes/ckeditor.lib');
  if ($init === FALSE) {
    $input_formats = ckeditor_profiles_compile();
    drupal_add_js(array('ckeditor' => array('input_formats' => $input_formats, 'plugins' => array())), 'setting');
    $init = TRUE;
  }

  if (isset($element['value'])) {
    if (!isset($element['format'])) {
      return $element;
    }
    if (isset($element['summary'])) {
      $element['value'] = ckeditor_load_by_field($element['value'], $element['format']['format'], TRUE, $element['summary']['#id']);
    }
    else {
      $element['value'] = ckeditor_load_by_field($element['value'], $element['format']['format']);
    }
  }
  else {
    $element = ckeditor_load_by_field($element, $element['#format']);
  }

  return $element;
}