gistfile1.php

<?php

if ( !function_exists( 'wpcom_vip_load_category_base' ) ):
/**
 * Enables a custom or no category base, if the site wants to use one that's not the WP.com default (/category/)
 *
 * Usage:
 *     wpcom_vip_load_category_base( '' );
 *     wpcom_vip_load_category_base( 'section' );
 *
 * @link http://vip.wordpress.com/documentation/change-your-pretty-permalinks-or-add-custom-rewrite-rules/ Change Your Pretty Permalinks
 * @param string $new_category_base New category base prefix
 */
function wpcom_vip_load_category_base( $new_category_base ) {
	define( 'WPCOM_VIP_CUSTOM_CATEGORY_BASE', true );
	global $wpcom_vip_category_base;
	$wpcom_vip_category_base = $new_category_base;
	add_filter( 'pre_option_category_base', '_wpcom_vip_filter_category_base', 99 ); // needs to be higher priority so we don't conflict with the WP.com filter
}
endif;

if ( !function_exists( '_wpcom_vip_filter_category_base' ) ):
/**
 * Applies the new category base to the option value
 *
 * @link http://vip.wordpress.com/documentation/change-your-pretty-permalinks-or-add-custom-rewrite-rules/ Change Your Pretty Permalinks
 * @param string $category_base New category base prefix
 * @return string The category base prefix
 */
function _wpcom_vip_filter_category_base( $category_base ) {
	global $wpcom_vip_category_base;
	return $wpcom_vip_category_base;
}
endif;