private function clean($string) {
	   $string = str_replace(' ', '', $string);
	   $string = str_replace('-', '', $string);
	   return preg_replace('/[^A-Za-z0-9\-]/', '', $string);
	}
private function clean($string) {
	   $string = str_replace(' ', '', $string);
	   $string = str_replace('-', '', $string);
	   return preg_replace('/[^A-Za-z0-9\-]/', '', $string);
	}
private function clean ( $ string ) { $ string = str_replace ( ' ' , '' , $ string ) ; $ string = str_replace ( '-' , '' , $ string ) ; return preg_replace ( '/[^A-Za-z0-9\-]/' , '' , $ string ) ; }
clean
clean the given string so it can be used as a class name on an element

@access private
@param string
@return string
clean clean the given string so it can be used as a class name on an element