Walker Menu in WordPress

/*Custom Header Menu*/
class IBenic_Walker extends Walker_Nav_Menu {
    
    function start_el(&$output, $item, $depth=0, $args=array(), $id = 0) {
    	$object 			= $item->object;
    	$type 				= $item->type;
    	$title 				= $item->title;
    	$description 		= $item->description;
    	$permalink 			= $item->url;


    	$anchorclass = '';
    	if($item->ID == 1372){
    		$anchorclass = 'btn';
    	}


    	

    	$output .= "<li class='" .  implode(" ", $item->classes) . "'>";

      if( $permalink && $permalink != '#' && $depth == 0  ) {
      	$output .= "<a class='".$anchorclass."' href='" . $permalink . "'><img src='".$description."'/><span>";

      	$output .= $title;
      }else{

      	$output .= "<a class='".$anchorclass."' href='" . $permalink . "'><span>";

      	$output .= $title;
      }



      if( $permalink && $permalink != '#' ) {
      	$output .= '</span></a>';
      } 
    }
}