Save Xml Nodes Ordered by its Attribute

[benhalkum]

This is my xml now. There can be added new "item" nodes and I want to have all that nodes sorted by categoryid.\[code\]<?xml version="1.0" encoding="utf-8"?><data> <banners> <banner type="search-bar"> <item img="http://site.com/3ac0a.png" id="5df129a6-1" categoryid="7" /> <item img="http://site.com/3ac1a.png" id="5df129a6-1" categoryid="10" /> <item img="http://site.com/3ac2a.png" id="dfgsdfgg-1" categoryid="1" /> <item img="http://site.com/3ac3a.png" id="5erjrthr-1" categoryid="2" /> <item img="http://site.com/3ac4a.png" id="yuj67445-1" categoryid="3" /> <item img="http://site.com/3ac5a.png" id="ghjmdmgh-1" categoryid="4" /> </banner> </banners></data>\[/code\]Like this\[code\]<?xml version="1.0" encoding="utf-8"?><data> <banners> <banner type="search-bar"> <item img="http://site.com/3ac2a.png" id="dfgsdfgg-1" categoryid="1" /> <item img="http://site.com/3ac3a.png" id="5erjrthr-1" categoryid="2" /> <item img="http://site.com/3ac4a.png" id="yuj67445-1" categoryid="3" /> <item img="http://site.com/3ac5a.png" id="ghjmdmgh-1" categoryid="4" /> <item img="http://site.com/3ac0a.png" id="5df129a6-1" categoryid="7" /> <item img="http://site.com/3ac1a.png" id="5df129a6-1" categoryid="10" /> </banner> </banners></data>\[/code\]I need Sorted XML to be saved