To change the category appearance, edit /themes/kosmos/setting.php
Code:
/*===================================================
category appearance
===================================================*/
$cat_table_width = "100%"; // table witdth
$cat_cellspacing = "3"; // table cellspacing
$cat_font_face = "Arial"; // category font face
$cat_link_style = "font-size: 11px; color: #000000;"; // category link style
$subcat_font_face = "Arial"; // sub category font face
$subcat_link_style = "font-size: 11px; color: #000000;"; // sub category link style
$category_separator = " > "; // string that will separate between the category and its subcategories
$number_of_links_format = " <font color=\"#000000\"><b>(<%\$number_of_links%>)</b></font>"; // number of links
$number_of_links_format_search_result = " "; // number of links
$cat_columns = 2;
$max_sub_cat = 5;
$cat_default_image = $site_url.'/themes/'.$active_theme.'/images/folder.gif';//"images/folder.gif";
$cat_description_format = "<a style=\"{font-size: 11px; color: #567E96;}\"><%\$cat_description%></a>";