foreach question.

I have a list of my $positions = array() in array below

PHP Code:

$positions = array(
'column_left',
'column_right',
'content_top',
'content_bottom'
);

foreach ($tmpdata as $position => $module) {
if (in_array($position, $positions)) {
$data[$position] = $this->load->view($position, $tmpdata[$position], TRUE);
}
} 


In my foreach loop it gets the positions that are set in the database and then loads the view for it. But because a position may not be set in database it throws error like

Undefined variable: column_right

How can I make it not throw that type of error if can not find position then should be some thing like 

PHP Code:

$data['column_right'] = $this->load->view('column_right', '', TRUE); 


PHP Code:

<?php

class Welcome extends CI_Controller {

public function __construct() {
parent::__construct();
$this->load->model('design/layout_model');
}

public function index() {
$layout_id = $this->layout_model->getlayoutID($this->router->class);

$modules = $this->layout_model->getlayoutsmodule($layout_id);

$tmpdata = array();

foreach ($modules as $module) {

$name = $module['name'];
   
   $this->load->library('module/' . $name);
   
   $tmpdata[$module['position']]['modules'][] = $this->load->view('module/question_help', $this->$name->get(), TRUE);
}

$positions = array(
'column_left',
'column_right',
'content_top',
'content_bottom'
);

foreach ($tmpdata as $position => $module) {
if (in_array($position, $positions)) {
    $data[$position] = $this->load->view($position, $tmpdata[$position], TRUE);
}
}

$this->load->view('welcome_message', $data);
}
} 


There's only one rule - please don't tell anyone to go and read the manual.  Sometimes the manual just SUCKS!