Correct xml file format and apply it to all xml file in a folder and subfolder

I have around 800 xml files with formt as below:

<?xml version="1.0" encoding="UTF-8"?>
<playlist version="1" xmlns = "http://xspf.org/ns/0/">
<trackList><track>
  <location>../ppa/1/50/01 - Taknavazi.111</location>
  <title>Taknavazi</title>
  <creator>1</creator>
    <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</track><track>
  <location>../ppa/1/50/02 - Saz-o-Avaz - Daramad AbuAta.111</location>
  <title>Sazo avaz-Darama abouatta</title>
  <creator>2</creator>
    <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</track><track>
  <location>../ppa/1/50/03 - Saz-o-Avaz - Hejaz-JameDaran-   Hejaz.111</location>
  <title>Sazo avaz-Hejaz-jamehdaran-hejaz</title>
  <creator>3</creator>
    <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</track><track>
  <location>../ppa/1/50/04 - Saz-o-Avaz - KordBayat-Ouj-Esfahanak-Forod.111</location>
  <title>Sazo avaz-bayate kord-ooj-esfahanak-foroud</title>
  <creator>4</creator>
    <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</track><track>
  <location>../ppa/1/50/05 - Saz-o-Avaz - Dashtestani-KhosroShirin-Dashtestaniat.111</location>
  <title>Sazo avaz-dashtestani-khosroo va shirin-dashtestaniyat</title>
  <creator>5</creator>
    <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</track><track>
  <location>../ppa/1/50/06 - Tasnif - Bahare Delkash.111</location>
  <title>Tasnif- bahare delkash</title>
  <creator>6</creator>
    <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</track></trackList>

and i want change its format like this:

<?xml version="1.0" encoding="UTF-8"?>
<playlist version="1" xmlns = "http://xspf.org/ns/0/">

<item>
  <file>../ppa/1/50/01 - Taknavazi.mp3</file>
  <title>Taknavazi</title>
  <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</item>
<item>
  <file>../ppa/1/50/02 - Saz-o-Avaz - Daramad AbuAta.mp3</file>
  <title>Sazo avaz-Darama abouatta</title>
  <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</item>
<item>
  <file>../ppa/1/50/03 - Saz-o-Avaz - Hejaz-JameDaran-Hejaz.mp3</file>
  <title>Sazo avaz-Hejaz-jamehdaran-hejaz</title>
  <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</item>
<item>
  <file>../ppa/1/50/04 - Saz-o-Avaz - KordBayat-Ouj-Esfahanak-Forod.mp3</file>
  <title>Sazo avaz-bayate kord-ooj-esfahanak-foroud</title>
  <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</item>
<item>
  <file>../ppa/1/50/05 - Saz-o-Avaz - Dashtestani-KhosroShirin-Dashtestaniat.mp3</file>
  <title>Sazo avaz-dashtestani-khosroo va shirin-dashtestaniyat</title>
  <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</item>
<item>
  <file>../ppa/1/50/06 - Tasnif - Bahare Delkash.mp3</file>
  <title>Tasnif- bahare delkash</title>
  <image>../images/Albumssmall70/Eshgh danad70.jpg</image>
</item>

Please let me know that is there a way that i correct one xml file and then apply new format to all another xml files in a folder and its subfolder? Thanks in advance