Create column groups in DataGrid in easyui-tabs?

[deib97]

Hi,
I had a problem when using the sample code from this :
http://www.jeasyui.com/tutorial/datagrid/datagrid9.php
when i paste in php files under easyui-tabs become like this :

Code:

<div data-options="region:'center',iconCls:'icon-layout'" style="padding: 2px;">
                <div id="tabhome" class="easyui-tabs" style="width:auto;" > 
                        <div id="konten_menu" title="Konten" style="padding: 2px;">
                        <?php
                            include "data/beranda.php";   
                        ?> 
                        </div>
                </div>
        </div>

But if i paste under easyui-tabs become good...
Why with my code??