Jamie My Model

New_MY_Model.php

//Now

    /**
     * Orders the result set by the criteria,
     * using the same format as CI's AR library.
     *
     * @param mixed $criteria The criteria to order by
     * @return void
     * @since 1.1.2
     */
    public function order_by($criteria, $order = 'ASC')
    {
        if ( is_array($criteria) )
        {
            foreach ($criteria as $key => $value)
            {
                $this->db->order_by($key, $value);
            }
        }
        else
        {
            $this->db->order_by($criteria, $order);
        }
        return $this;
    }

Old_MY_Model.php

//Now

    /**
     * Orders the result set by the criteria,
     * using the same format as CI's AR library.
     *
     * @param string $criteria The criteria to order by
     * @return void
     * @since 1.1.2
     */
    public function order_by($criteria, $order = 'ASC')
    {
        $this->db->order_by($criteria, $order);
        return $this;
    }