initial_data_dump.php

<?php
require('ci.base.php');

const MY_CATEGORY_FIELDS = 'my_category_fields_option';

$tag_extra_fields = array(
  141 => array(
    'category_custom_fields' => '',
    'category_custom_fields_type' => ''
  ),
  746 => array(
    'your_image_url' => '',
    'category_image' => '',
    'category_icon_code' => '',
    'category_icon_color' => '',
    'category_custom_fields' => array(
      array('Year'),
    ),
    'category_custom_fields_type' => array(
      array('dropdown', '2011, 2012'),
    )
  )
);

update_option(MY_CATEGORY_FIELDS, $tag_extra_fields);

?>