title: Quickbook PHP API - get category list
body: <p>I need category list from Quickbooks Account.
  So here I am using this query</p>
  
  <blockquote>
    <p>select * from Item where Type='Category'</p>
  </blockquote>
  
  <p>But I get all the item list instead of the category list. What have I done wrong? </p>
  
  <p>Please help, thanks in advance.</p>