Arranging array results from a MySQL query - php

Question

I'm making a brochure generator based on inventory in a database. Due to the way the on-paper brochure looks, the order of items display will not match the way mysql_fetch_array works. Each user chosen category holds four items in a 2X2 grid.
Category 1 ---------Category 2
[1] [2] ---------[5] [6]
[3] [4] ---------[7] [8]
Category 3 ---------Category 4
[9] [10] ---------[13] [14]
[11] [12] ---------[15] [16]
I've already created a basic table as a placeholder for the items in this pattern. This is my query to retrive the items.
$query = "SELECT t1.*, image_path FROM flyer_item AS t1
LEFT JOIN product_images AS t2 ON t1.product_id = t2.product_id WHERE id_page = '".$id_page."'";
echo $query."<br>";
$result = mysql_query($query);
echo '<h3 class = "splitter">Items</h3>';
//-create while loop and loop through result set
//Due to the unique item arrangement patter, we fill
//an array with the fetched array results.
$iArray = array();
while($row=mysql_fetch_array($result))
{
$iArray[] = $row;
$square = $row['square'];
$item_name = $row['item_name'];
$sales_info = $row['sales_info'];
$link = $row['image_path'];
$sku_item_number = $row['sku_item_number'];
if (empty($link))
{
$link = '../imagen/no_imagen.gif';
}
}
One page can hold up to a maximum of 24 items, all following the pattern mentioned above to make sure items are in their respective categories. I'm contemplating making another database table called Categories that will store its four items, but is there a way I can use the second array, iArray, to store the number indicating where the items should go?
The actual table looks like this, to match the original document.
<table width="100%" border="1" bordercolordark="#000000" bordercolorlight="#000000">
<tr>
<td> </td>
<td colspan="2" align="center"><?php echo $category1; ?></td>
<td> </td>
<td colspan="2" align="center"><?php echo $category2; ?></td>
<td> </td>
</tr>
<tr>
<td> </td>
<td>Item 1</td>
<td>Item 2</td>
<td> </td>
<td>Item 5</td>
<td>Item 6</td>
<td> </td>
</tr>
<tr>
<td> </td>
<td>Item 3</td>
<td>Item 4</td>
<td> </td>
<td>Item 7</td>
<td>Item 8</td>
<td> </td>
</tr>
<tr>
<td> </td>
<td colspan="2" align="center"><?php echo $category3; ?></td>
<td> </td>
<td colspan="2" align="center"><?php echo $category4; ?></td>
<td> </td>
</tr>
<tr>
<td> </td>
<td>Item 9</td>
<td>Item 10</td>
<td> </td>
<td>Item 13</td>
<td>Item 14</td>
<td> </td>
</tr>
<tr>
<td> </td>
<td>Item 11</td>
<td>Item 12</td>
<td> </td>
<td>Item 15</td>
<td>Item 16</td>
<td> </td>
</tr>
<tr>
<td> </td>
<td colspan="2" align="center"><?php echo $category5; ?></td>
<td> </td>
<td colspan="2" align="center"><?php echo $category6; ?></td>
<td> </td>
</tr>
<tr>
<td> </td>
<td>Item 17</td>
<td>Item 18</td>
<td> </td>
<td>Item 21</td>
<td>Item 22</td>
<td> </td>
</tr>
<tr>
<td> </td>
<td>Item 19</td>
<td>Item 20</td>
<td> </td>
<td>Item 23</td>
<td>Item 24</td>
<td> </td>
</tr>
</table>