How To Pass Html Inside A Variable?

Guys

I am using yiibooster extension TbButton as seen below


$this->widget(

    'bootstrap.widgets.TbButton',

    array(

        'label' => 'Login',

        'type' => 'danger',

        'htmlOptions' => array(

            'data-title' => 'Sign in to continue',

            'data-placement' => 'bottom',

            [b]'data-content' => "",[/b]

            'data-toggle' => 'popover'

        ),

    )

);



The thing is , I have already created a login form and want that the [b]


"data content" 

[/b] should contain the code for the login

<form>

<input type=username>

<password>

<end form>

etc,

how can do that? have you also come across similar situation? please let me know!