uf/admin/template/forums_view_end_body.tpl

<div align="left" style="width: <?= TABLES_WIDTH; ?>">
<form action="admin_forums.php?mode=new&submode=cat" method="POST">
<input type="text" name="cat_name" maxlength="25" value="<?= $skin['here_write_name_cat']; ?>">&nbsp;
<input type="submit" class="fbutton" value="<?= $skin['new_cat_submit']; ?>">
</form>