ACC SHELL

<?php
class TF_Html_Button extends TF_Html
{
    function __construct ($title, $attributes = array(), $isXhtml = true)
    {
    	if(isset($attributes["class"])){
        	$attributes["class"] = implode(" ", array($attributes["class"] , "TFButton"));
    	} else {
    		$attributes["class"] = "TFButton";
    	}
        parent::__construct('div', $title, $attributes, false, $isXhtml);
    }
}