controller render append aditional output

hi,

I have in my view main.php


<div id="content" class="container_12">

	<div class="grid_12">

		<h1><?php echo CHtml::encode($this->pageTitle); ?></h1>

	</div>

	<?php echo $content; ?> 

	<div class="clear"></div>

</div>

when i run a page on browser under view source it shows:

(See between and Tags)


<div id="content" class="container_12">


	<div class="grid_12">


		<h1>My Web Application - Jackpot</h1>


	</div>


	[b]<div class="container"> 

	<div id="content"> 

             These 2 div's are messing with my design

	</div><!-- content --> 

        </div>[/b]

 


	<div class="clear"></div>


</div>



how could i remove these 2 div’s from content?

see this file

protected/view/layouts/column1.php

it works, but why this file is called? and where is it