The theme phpkaox is not part of Xoops core more. In earlier versions of Xoops core, there was some theme definitions in xoopsroot/ xoops.css They are removed, so you should include them in your themes CSS file The missing lines are #mainmenu a {text-align:left; display: block; margin: 0; padding: 4px;} #mainmenu a.menuTop {padding-left: 3px;} #mainmenu a.menuMain {padding-left: 3px;} #mainmenu a.menuSub {padding-left: 9px;} #usermenu a {text-align:left; display: block; margin: 0; padding: 4px;} #usermenu a.menuTop {} #usermenu a.highlight {color: #0000ff; background-color: #fcc;}
The linebreak in the menu is created by display: block;