Question

Is there any way to show all the multiple selected values on the top.
eg. if the list contains 1 to 10 and selected values are 4,8 then the listbox should have values like 4,8,1,2,3,5,6,7,9,10

Answer 1

These are the two common ways to list data for selects.

echo CHtml::dropDownList('public', $model, array('0' => 'Private', '1' => 'Public'));

echo CHtml::activeDropDownList($model, 'developers_id', CHtml::listData(Developers::model()->findAll(), 'id', 'email') , array('prompt'=>'Select'));

The first one uses an array, and you can define, relocate your array keys based on user preference.

On second, probably introducing a Criteria in the findAll() call that will order the user chosen values first, it will do the job.

Update

You could go something like:

echo CHtml::listBox('listname',$selectedlist,array_intersect_key($alllist,array_flip($selectedlist))+$alllist,array('multiple' => 'multiple'));

in examples:

$selectedlist=array(3,5);
$alllist=array(1=>'one',2=>'two',3=>'three',4=>'four',5=>'five');

$a=array_intersect_key($alllist,array_flip($selectedlist))+$alllist;
print_r($a);

Array ( [3] => three [5] => five [1] => one [2] => two [4] => four )

See the code in action http://ideone.com/6BDxQ