customize pages list on widget

Im triing to customize the visualization of the pages widget

my target is to higlight the .current_page_item a in the sidebar and to remove the link at each top menu item

i did the first in this way and seam its working:

.widgetcontent .current_page_item a {
font-weight: bold;
color: red !important;
text-decoration: none;
}

but i cant remove the top link, actually i have a # as link but i would remove it all