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I'm stuck parsing this label with SimpleXML PHP.

This is my file:

<cpe-item name="cpe:/a:%240.99_kindle_books_project:%240.99_kindle_books:6::">
    <cpe-23:cpe23-item name="cpe:2.3:a:\*:*:*:*:*:*:*:*:*:*"/>
</cpe-item>

And I want to parse name content on cpe-23:cpe23-item.

This is my code for now:

foreach ($xml->{'cpe-item'} as $cpe) {
  echo $cpe->children('cpe-23', TRUE) // This is the line I have to modify
}

Thanks in advantage!