We can do something like this to get pager below and above the grid.
<?php $this->widget('zii.widgets.grid.CGridView', array(
'id'=>'children-grid',
'dataProvider'=>$model->search(),
'filter'=>$model,
'template'=>"{pager}\n{summary}\n{items}\n{pager}",//We can modify this property according to our taste.
'columns'=>array(
'id',
//other columns to follow...