hyperlink - How to add menu link wrapper in drupal 7? -

i have menu, 1 menu item looking this:

<li>   <a href="aaa">link title</a> </li> 

and want this:

<li>   <a href="aaa">     <div class="custom">link title</div>   </a> </li> 

or this:

<li>   <div class="custom">     <a href="aaa">link title</a>   </div> </li> 

how can this?

this works:

function theme_menu_link(array $variables) {    $variables['element']['#localized_options']['html'] = true;   $variables['element']['#title'] = '<div class="custom">' . $variables['element']['#original_link']['link_title'] . '</div>';  return theme_menu_link($variables); }