foreach($p as $pat)
   {
    print'<pre>';
    print_r($pat['name']);
    print'</pre>';

   $c = Jojo::selectQuery("SELECT * FROM {cat} WHERE {parentid} =?", array($pat['categoryid']));

   foreach($c as $cat)
   {
        print'<pre>    ';
        print_r($cat['name']);
        print'</pre>';
   }

  $dropcat =  array();
  $dropcat[$cat[$pat['categoryid'][0]] = $pat['id']];

  print_r($dropcat);
}

$dropcat[$cat[$pat['categoryid'][0]] = $pat['id']];
// Should be
$dropcat[$cat[$pat['categoryid'][0]]] = $pat['id'];

$dropcat =  array();
print_r($dropcat);