Resolved Export custom XML format

Hello,

I want to export FB catalog XML feed, but in custom XML output is:

<entry>

    <g:id>[virtuemart_product_id]</g:id>

    <g:title>[product_name]</g:title>

    <g:description>[product_desc]</g:description>

    <g:link>[product_url]</g:link>

    <g:image_link>[file_url]</g:image_link>

    <g:condition>new</g:condition>

    <g:availability>in stock</g:availability>

    <grice>[product_price]</grice>

</entry>

please, help how replace string in [...] with value?

Best regards
Andrej