unsetting array's problem (PHP)

[Ancient]

I've hit a bump in the road.

Current Arrays:

$find_user

PHP Code:

Array([0] => Array([0] => 'Ancient', [username] => 'Ancient', [1] => 'Password', [password] => 'password'),
[1] => Array([0] => 'Ancient2', [username] => 'Ancient2', [1] => 'Password', [password] => 'Password')) 


Right now I'm trying to get rid of [0] => 'Ancient', and just leave [username] => and [password].
The goal is to unset some array #s and keep the array keys.

Goal:

PHP Code:

Array([0] => Array([username] => Ancient, [password] => Password),
[1] => Array([username] => Ancient2, [password] => Password)) 


What I have now:

PHP Code:

function kill_num_array($item, $array = false)
            {
                if(!$array)
                    {
                        //
                        // Gets rid of numbered arrays.
                        // Example: $find_user[0]['id'] changes to $find_user['id']
                        //
                        $i = 0;
                        while(count($item[0]) >= $i)
                            {
                                unset($item[0][$i]); // Error Log shows this line is bad.
                                $i++;
                            }
                        unset($i);
                        return $item[0];
                    }
                else{
                        //
                        // Gets rid of sub-numbered arrays
                        // Example: $find_user[1][0]  changes to $find_user[1]['some_key']
                        //
                        $i = 0;
                        $a = 0;
                        while(count($item[$a]) >= $i)
                            {
                                unset($item[$a][$i]);
                                $i++;
                                if($i > count($item[$a]))
                                    {
                                        $a++;
                                        $i = 0;
                                    }
                                if($a > count($item))
                                    {
                                        unset($a, $i);
                                        exit;
                                    }
                            }
                        continue;
                        return $item;
                    }
            } 


To me the function looks fine.
But PHP must really hate me because it's throwing up a bunch of errors now.
What's weird, is that this worked before and now even though I haven't touched it, it's throwing up errors.


EDIT:
After a long time of debugging I finally found the answer.

PHP Code:

function kill_num_array($item, $array = false)
            {
                if(!$array)
                    {
                        //
                        // Gets rid of numbered arrays.
                        // Example: array($find_user[0], $find_user['id']) changes to $find_user['id']
                        //
                        $i = 0;
                        while(count($item) >= $i)
                            {
                                unset($item[$i]);
                                $i++;
                            }
                        unset($i);
                        return $item;
                    }
                else{
                        //
                        // Gets rid of sub-numbered arrays
                        // Example: $find_user[1][0]  changes to $find_user[1]['some_key']
                        //
                        $i = 0;
                        $a = 0;
                        while(count($item[$a]) >= $i)
                            {
                                unset($item[$a][$i]);
                                $i++;
                                if($i >= count($item[$a]))
                                    {
                                        $a++;
                                        $i = 0;
                                    }
                                if($a >= count($item))
                                    {
                                        unset($a, $i);
                                        exit;
                                    }
                            }
                        continue;
                        return $item;
                    }
            }