how to add break in loop

[drooh]

$var .= '<li><a href="/'.$parent.'/'.$link.'/">'.$nav_title.'</a></li>';

how can i do this

$var .= '<li><a href="/'.$parent.'/'.$link.'/">'.$nav_title.'</a></li>\n';

it seems this works ok
$var = "<li><a href="/"".$parent.""/">"".$dropdown_title.""</a></li>\n";

[bkeep]

$var .= "<li><a href=\"$parent/$link\">$dropdown_title</a></li>\n";