From B2evolution

$Item->permanent_link( array(
      'before'      => ' ',
      'after'       => ' ',
      'text'        => '#',	// possible special values: '#', '#icon#', '#text#', '#title#'
      'title'       => '#',
      'class'       => ''
  ) );

$Item->permanent_link( array('class' => 'permalink_right'));

another option for array: ( array('text' => '#icon#')

Can you change the class value?

We really need to come here and add all the possible values for the Array ()