MyBB Community Forums

thanks matt, for your hint.

well, to increase the order input box width, open up
/admin/modules/forum/management.php file
and find

$form_container->output_cell("<input type=\"text\" name=\"disporder[".$forum['fid']."]\" value=\"".$forum['disporder']."\" class=\"text_input align_center\" style=\"width: 80%;\" />", array("class" => "align_center"));

and change 80%; to somevalue px;
Ex: 50px;

Change the value according to your need.