вероятно в настройках вашего шаблона Joomla, если они конечно есть. иначе только в коде
В настройках шаблона ничего подобного не нашел, в редакторе HTML шаблона, все что нашел относительно меню:
// Template Configuration
$s5_menu = $this->params->get ("xml_s5_menu");
$s5_effects = $this->params->get ("xml_s5_jsmenu");
$s5_widthtype = $this->params->get ("xml_s5_widthtype");
$s5_body_width = $this->params->get ("xml_s5_body_width");
$s5_left_width = $this->params->get ("xml_s5_left_width");
$s5_right_width = $this->params->get ("xml_s5_right_width");
$s5_inset_width = $this->params->get ("xml_s5_inset_width");
$s5_show_frontpage = $this->params->get ("xml_s5_frontpage");
$s5_topback = $this->params->get ("xml_s5_topback");
$s5_headerback = $this->params->get ("xml_s5_headerback");
$s5_bottomback = $this->params->get ("xml_s5_bottomback");
$s5_register = $this->params->get ("xml_s5_register");
$s5_login = $this->params->get ("xml_s5_login");
$s5_loginout = $this->params->get ("xml_s5_loginout");
$s5_backimage = $this->params->get ("xml_s5_backimage");
$s5_backcolor = $this->params->get ("xml_s5_backcolor");
$s5_mbbackcolor = $this->params->get ("xml_s5_mbbackcolor");
$s5_text_menu_1 = $this->params->get ("xml_s5_text_menu_1");
$s5_text_menu_2 = $this->params->get ("xml_s5_text_menu_2");
$s5_text_menu_3 = $this->params->get ("xml_s5_text_menu_3");
$s5_text_menu_4 = $this->params->get ("xml_s5_text_menu_4");
$s5_text_menu_5 = $this->params->get ("xml_s5_text_menu_5");
$s5_text_menu_6 = $this->params->get ("xml_s5_text_menu_6");
$s5_text_menu_7 = $this->params->get ("xml_s5_text_menu_7");
$s5_text_menu_8 = $this->params->get ("xml_s5_text_menu_8");
$s5_text_menu_9 = $this->params->get ("xml_s5_text_menu_9");
$s5_text_menu_10 = $this->params->get ("xml_s5_text_menu_10");
$s5_subtext = $this->params->get ("xml_s5_subtext");
$s5_colors = $this->params->get ("xml_s5_colors");
$s5_tweetwithusl = $this->params->get ("xml_s5_tweetwithusl");
$s5_rssl = $this->params->get ("xml_s5_rssl");
$s5_tooltips = $this->params->get ("xml_s5_tooltips");
$s5_multibox = $this->params->get ("xml_s5_multibox");
$s5_multioverlay = $this->params->get ("xml_s5_multioverlay");
$s5_multicontrols = $this->params->get ("xml_s5_multicontrols");
$s5_urlforSEO = $this->params->get ("xml_s5_seourl");
И
<?php if (($s5_colors == "red") || ($s5_colors == "green") || ($s5_colors == "gray") || ($s5_colors == "blue") || ($s5_colors == "brown")) { ?>
<?php if($this->direction == "rtl") { ?>
#s5_navv ul li ul li {background:transparent url(<?php echo $LiveSiteUrl;?>templates/university/images/<?php echo $s5_colors;?>/Shape5_University_ddmiddle_rtl.png)}
#s5_navv ul li.s5_menutop, #s5_navv ul li.s5_menutop:hover {background:transparent url(<?php echo $LiveSiteUrl;?>templates/university/images/<?php echo $s5_colors;?>/Shape5_University_ddtop_rtl.png) no-repeat scroll 0 0;}
#s5_navv ul li.s5_toparrow, #s5_navv ul li.s5_toparrow:hover {background:transparent url(<?php echo $LiveSiteUrl;?>templates/university/images/<?php echo $s5_colors;?>/Shape5_University_ddtop_rtl.png) no-repeat scroll 0 0;}
#s5_navv ul li.s5_menubottom, #s5_fm_ul0 ul li.s5_menubottom, #s5_navv ul li.s5_menubottom:hover, #s5_fm_ul0 ul li.s5_menubottom:hover {background:transparent url(<?php echo $LiveSiteUrl;?>templates/university/images/<?php echo $s5_colors;?>/Shape5_University_ddbottom_rtl.png) no-repeat scroll 0 0;margin-left:0px;}
#s5_navv ul li li.lastitem a:hover {background:transparent url(<?php echo $LiveSiteUrl;?>templates/university/images/<?php echo $s5_colors;?>/Shape5_University_ddmiddle_rtl.png) repeat-x scroll 1px 0;}
#s5_navv ul li ul li {background:transparent url(<?php echo $LiveSiteUrl;?>templates/university/images/<?php echo $s5_colors;?>/Shape5_University_ddmiddle_rtl.png) }
#s5_navv ul li ul li:hover, #s5_navv ul li ul li.over {background:transparent url(<?php echo $LiveSiteUrl;?>templates/university/images/<?php echo $s5_colors;?>/Shape5_University_ddmiddle_rtl.png) repeat-y 0px 0px; }
Ну это бред, что target влияет на стиль ссылки, какая может быть связь непонятно, поэтому и где смотреть непонятно.