Multiselect Checkbox Storage

//this is the code which i used in my _form where i am selcting questions in my multiselect checkbox and i actually want it like if i select 2 checkboxes at a time then that two values will get stored in my database where i use this field as varchar???

<?php $data= CHtml::listData(QuestionBank::model()->findAll(), ‘id’, ‘question’);

&#036;this-&gt; widget('ext.EchMultiselect.EchMultiselect', array(

'model' =&gt; &#036;model,

'dropDownAttribute' =&gt; 'Questions',     

'data' =&gt; &#036;data,

'dropDownHtmlOptions'=&gt; array(



	'options' =&gt; array( 




‘checkAllText’=>Yii::t(‘application’,‘Check all’),

‘uncheckAllText’=>Yii::t(‘application’,‘Uncheck all’),

‘noneSelectedText’=>Yii::t(‘application’,‘Select an Option’),

‘selectedText’=>Yii::t(‘application’,’# selected’),









            // set this to true, if you want to use the Filter Plugin





My controller code:-

public function actionCreate()


	&#036;model=new Test;

	// Uncomment the following line if AJAX validation is needed

	// &#036;this-&gt;performAjaxValidation(&#036;model);












what code should i write in my controller?