php foreach multidimensional array recursion not working?

Some kind of followup to my last question: for loop - move deeper on numeric key in multidimensional array

I have this array as input:

Array
(
  [0] => apl_struct Object
    (
      [funcname] => say
      [args] => Array
        (
          [0] => Array
            (
              [0] => apl_struct Object
                (
                  [funcname] => text
                  [args] => Array
                    (
                      [value] => hello
                    )
                )
            )
        )
    )
)

I now have 2 functions working for me. One is a func only for getting the next key/value in an associative array. None of the next(), prev(), etc. were working for me like on indexed arrays:

function getnext($array, $key) {
  $keys = array_keys($array);

  if ((false !== ($p = array_search($key, $keys))) && ($p < count($keys) - 1)) {
    return array('key' => $keys[++$p], 'value' => $array[$keys[$p]]);
  } else {return false;}
}

The next function is my executer or constructer. he creates a semi-xmlstruct for me. I tried to add recursion for skipping the numeric key. They're obviously nonsense and can be skipped.

I then want to check if all the values of the non-numeric keys are arrays or not. If it is an array it indicates arguments to be followed and output should look like: INPUT.

If not, it's either the functionname (funcname) or indeed a real value for us like "hello".

function arr2xml($array, $level = 1, $pos = 1) {
  $xml = '';

  foreach ($array as $key => $value) {
    if (is_object($value)) {$value = get_object_vars($value);}// convert object to array
      if (is_numeric($key)) {
        $xml .= arr2xml($value);
      } else {
        if (!is_array($value)) {
          switch ($key) {
            case 'funcname':
              $nextkey = getnext($array, $key);
              $xml .= str_repeat("\t", $level) . "<apl:$value>\n";
              $xml .= arr2xml($nextkey['value'], $level++);
              $xml .= str_repeat("\t", $level) . "</apl:$value>\n";
              break;
            case 'value':
              $xml .= str_repeat("\t", $level) . "\t$value\n";
              break;
          }
        } else {
            $xml .= str_repeat("\t", $level) . "<$key pos='$pos'>\n\t";
            $xml .= arr2xml($value, $level++, $pos++);
            $xml .= str_repeat("\t", $level) . "</$key>\n";
        }
      }
  }

return $xml;
}

but what I am getting out of this so far is this: the function name was inserted right. it is say and text. also, in some wild circumstances, the -tag and the value are executed properly.

<apl:say>
<apl:text>
    hello
    </apl:text>
    <args pos='1'>
        hello
      </args>
    </apl:say>
    <args pos='1'>
    <apl:text>
    hello
    </apl:text>
    <args pos='1'>
        hello
      </args>
      </args>
</xml>

for me it looks like the recursion isn't really working. Am i missing something here? I've tried to rebuild it from previous mentioned post.

Also I'm wondering about the multiple output I am getting here. The tags seem to get filled right, but the actual arrangement is quite confusing for me.

I was expecting the output to look like this:

<apl:say>
  <args pos='1'>
    <apl:text>
      <args pos='1'>
      hello
      </args>
    </apl:text>
  </args>
</apl:say>

Thanks in advance