category.xml

<?xml version="1.0" encoding="utf-8"?> 
<category category_id="0"> 
    <name>categories</name>
    <categories>
        <category category_id="1"> 
    		<name>name2</name> 
            <categories>
                <category category_id="2"> 
            		<name>name4</name> 
	            </category>
            </categories>
            <codes>
                <code code_id="1">
                    <name>name3</name>
                    <description>description3</description>
                </code>
            </codes>
	    </category>
        <category category_id="3"> 
    		<name>name3</name> 
            <categories></categories>
            <codes></codes>
	    </category>
    </categories>
    <codes>
        <code code_id="2">
            <name>name1</name>
            <description>description1</description>
        </code>
        <code code_id="3">
            <name>name2</name>
            <description>description2</description>
        </code>
    </codes>
</category>