(PHP) Fetch from DB then print as list

Maybe I'm being dumb here but I can't find what I'm doing wrong. I have a table of categories in my database.

ID-------Name--------Parent

20-------Apples------ 1

21-------Bananas-----2

22-------Oranges-----3

24-------Peaches-----1

25-------Tomato----- 1

I want to fetch all records where parent equals to a certain value (eg Parent = 1) and then print this as unordered list.

Right now I have:

function getChild()
{
//Take value from url
$catId = (int)$_GET['c'];

//Query to DB
$sql = "SELECT cat_id, cat_name FROM tbl_category WHERE cat_parent_id=$catId";
$result = dbQuery($sql);

$childcat = array();
	while ($row = dbFetchAssoc($result)) {
       $childcat[] = $row;
   }

return $childcat;
}

So this takes the id and name of a category. The id is to be used later for URL purposes.

<?php
$child = getChild();
	foreach ($child as $childcat) {
		$cat_id = $childcat['cat_id'];
		$cat_name = $childcat['cat_name'];
		$url = $_SERVER['PHP_SELF'] . "?c=$cat_id";
	}

//Print array as list.
echo "\n<ul>\n" ;
	foreach($child as $childcat){
		echo "<li><a href=\"" . $_SERVER['PHP_SELF'] . "?c=$cat_id" . "\">$cat_name</a></li>\n";
}
echo "</ul>" ;
?>

All this does is print the same record (it chooses the last one) over a number of times. It does get the number of records to be fetched right. So suppose it was to fetch all records with a parent of 1 (3 records) it will show the record Tomato in a list three times.

How can I fix this? Thanks in advance.