Get all records from query

I am new in PHP programming. I'm doing 1 assignment to display treestructure of categories with it's subcategories. I get all categories through query but result of query of saubcategories give only one record, i have 3 subcategories. Why this is happen? My query gives proper result in Mysql Query Browser but on my site I get only one subcategory.
Please do reply.

 

can you post the code?

 

This is my function to get result:



function getHello($params)
{

$db =& JFactory::getDBO();
$user =& JFactory::getUser();
$userId = (int) $user->get('id');

/* return categories*/
$query='Select id,title from jos_sections s';

$db->setQuery( $query );
$section = $db->loadObjectList();

/*return subcategories of particular sections*/

$qid='Select id from jos_sections s';
$db->setQuery($qid);
$data=$db->loadObjectList();

$i = 0;

$lists = array();
//while($row = mysql_fetch_array($query))

foreach ($section As $lSection)

{
$lists[$i]->text = htmlspecialchars( $lSection->title );




$query1 = 'Select s.id,s.title,c.id, c.title From joomladb.jos_sections s Inner Join joomladb.jos_categories c On s.id=c.id Where s.id= '.$lSection->id ;
?> <br> <?php
$db->setQuery( $query1 );
$cat = $db->loadObjectList();
$j = 0;
foreach ($cat as $lCat)
{
$lists1[$j]->text = htmlspecialchars( $lCat->title );}
echo $lists1[$j]->text;
$j++;
}


$i++;

//}

return $lists.$lists1 ;
}