DepDrop Custom Option Entry

Hi all, I have the following sub DepDrop box:




    <!-- SELECT CLIENT -->

	<?php 

		echo $form->field($model, 'id')->widget(DepDrop::classname(), [		

			'options'=>['id'=>'client-id', 'style'=>'width:450px'],

			'pluginOptions'=>[

			'depends'=>['company-id'],

			'placeholder'=>'Select...',

			'url'=>Url::to(['.......'])

			]

		])->label('Select a Client');							

	?>

	<!-- SELECT CLIENT -->



This will build a list of clients based on Company selected. I need the option ‘All’ right at the top of the list.

Any help appreciated.

Thanks

Bump