Working with arrays and checkboxes

[eluser]xtremer360[/eluser]
If you notice in the bottom var dump you notice how both of the objects have a news article id of 1 which is the article your viewing which is right. Now the tags associated with it is tag id 1 and tag id of 2. So if you look above those are all the post tags in the database.
I need it to take those two post tag ids of 1 and 2 and scroll through the top object and have the post tag with an id of 1 and 2 be checked so according to this the checkbox of Kid Wonder and Oriel should both be checked. I tried the in_array but couldn't find a working solution.

Code:

news_article_post_tags

array(3) {
  [0]=>
  object(stdClass)#33 (2) {
    ["news_article_post_tag_id"]=>
    string(1) "1"
    ["news_article_post_tag_name"]=>
    string(10) "Kid Wonder"
  }
  [1]=>
  object(stdClass)#34 (2) {
    ["news_article_post_tag_id"]=>
    string(1) "2"
    ["news_article_post_tag_name"]=>
    string(5) "Oriel"
  }
  [2]=>
  object(stdClass)#35 (2) {
    ["news_article_post_tag_id"]=>
    string(1) "3"
    ["news_article_post_tag_name"]=>
    string(11) "Ryu Satoshi"
  }
}

news article index post tags data

array(2) {
  [0]=>
  object(stdClass)#37 (2) {
    ["news_article_id"]=>
    string(1) "1"
    ["news_articles_post_tag_id"]=>
    string(1) "1"
  }
  [1]=>
  object(stdClass)#38 (2) {
    ["news_article_id"]=>
    string(1) "1"
    ["news_articles_post_tag_id"]=>
    string(1) "2"
  }
}

Code:

<?php
foreach ($news_article_post_tags as $news_article_post_tag)
{
    if (in_array($news_article_post_tag->news_article_post_tag_id, $news_articles_index_post_tags_data))
    {
        $checked_value = 'checked';
    }
    else
    {
        $checked_value = '';
    }
        $data = array('name' => 'news_article_post_tags', 'id' => $news_article_post_tag->news_article_post_tag_id, 'checked' => $checked_value);
        echo form_label(form_checkbox($data).$news_article_post_tag->news_article_post_tag_name);
    }
?>