error 414 uri too long

this is my js code

Code:

var News = {
    edit: function (news, newsId) {
        var overlay   = getById('overlay'),
            editPopup = getById('editPopup');

        Ajax.request({
            url: '/az/management/get_news/' + newsId,
            success: function (azData) {
                Ajax.request({
                    url: '/ru/management/get_news/' + newsId,
                    success: function (ruData) {
                        window.frames[0].document.body.innerHTML = azData;
                        window.frames[1].document.body.innerHTML = ruData;

                        overlay.style.height    = document.compatMode != 'CSS1Compat' ?
                            document.body.scrollHeight :
                            document.documentElement.scrollHeight + 'px';
                        overlay.style.display   = 'block';
                        editPopup.style.display = 'block';
                    }
                });
            }
        });

        getById('update').onclick = function () {
            /* THE PRIMARY PROBLEM IS BELOW */
            Ajax.request({
                url: '/az/management/get_news/' + newsId +
                     '/?az=' + CKEDITOR.instances['az-editor'].getData() +
                     '/&ru=' + CKEDITOR.instances['ru-editor'].getData(),
                success: function (data) {
                    if (data) {
                        _endEditing();
                    }
                }
            });
        };

        getById('close').onclick = _endEditing;

        function _endEditing() {
            overlay.style.display   = '';
            editPopup.style.display = '';
        }
    },

    del: function () {
        //
    }
};

n this is my php code

PHP Code:

public function update_news($news_id)
    {
        $this->db->where('news_id', $news_id);
        $this->db->set('news_text', $this->input->post('az'));
        $az = $this->db->update('az_news');

        $this->db->where('news_id', $news_id);
        $this->db->set('news_text', $this->input->post('ru'));
        $ru = $this->db->update('ru_news');

        if ($az === FALSE || $ru === FALSE)
        {
            exit;
        }

        exit(TRUE);
    } 


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