Arrayen var inte okej.
Det här fungerar
$in_array = array (
// array(
'id' => 400,
'n' => 'Sub 1a',
's' => array (
// array (
'n' => 'Sub 1b',
'id' => 421,
's' => array (
// array (
'n' => 'Sub 1c',
'id' => 422,
// )
)
// )
// )
),
array(
'id' => 500,
'n' => 'Sub 2a',
's' => array (
// array (
'n' => 'Sub 2b',
'id' => 521,
's' => array (
// array (
'n' => 'Sub 3b',
'id' => 522,
// )
)
// )
)
)
);
$a_newTree = array();
function rebuild_tree($parent, $left) {
global $a_newTree;
$indexed = array();
$right = $left+1;
if(array_key_exists('n',$parent)){
$indexed['n'] = $parent['n'];
}else{
$indexed['n'] = '?';
}
foreach($parent as $cat){
if(is_array($cat)){
$right = rebuild_tree($cat, $right);
}
}
array_push($a_newTree,array(':lft'=>$left,':rgt'=>$right,':name'=>$indexed['n']));
return $right+1;
}
rebuild_tree($in_array, 1);