public static function instance($options = array())
 {
     if (is_null(self::$instance) && CS_ACTIVE_TAXONOMY) {
         self::$instance = new self($options);
     }
     return self::$instance;
 }
<?php

if (!defined('ABSPATH')) {
    die;
}
// Cannot access pages directly.
// ===============================================================================================
// -----------------------------------------------------------------------------------------------
// TAXONOMY OPTIONS
// -----------------------------------------------------------------------------------------------
// ===============================================================================================
$options = array();
// -----------------------------------------
// Taxonomy Options                        -
// -----------------------------------------
$options[] = array('id' => '_custom_taxonomy_options', 'taxonomy' => 'taxonomy_name', 'fields' => array(array('id' => 'section_1_text', 'type' => 'text', 'title' => 'Text Field'), array('id' => 'section_1_textarea', 'type' => 'textarea', 'title' => 'Textarea Field')));
$options[] = array('id' => '_custom_taxonomy_options', 'taxonomy' => 'another_taxonomy_name', 'fields' => array(array('id' => 'section_1_text', 'type' => 'text', 'title' => 'Text Field')));
CSFramework_Taxonomy::instance($options);