I had to use the following function for the same. May be this can be used by overriding the category page.
function getAllCategoriesSelectSpec()
{
return array(
'columns' => array('^categories.categoryid', '^categories.parentid', 'title' => '^categories.title', 'tags' => '^categories.tags', '^categories.qcount', '^categories.position', 'content'=>'^categories.content', 'backpath'=>'^categories.backpath',
),
'source' => '^categories',
'arguments' => '',
'arraykey' => 'categoryid',
'sortasc' => 'title',
);
}
$q2a_categories=qa_db_select_with_pending( $this->getAllCategoriesSelectSpec() );