jQuery(document).ready(function(){
        jQuery("#Top_menu").children("li").children("a").each(function(){                 
               var amended = "<span class='menu_span'>" + jQuery(this).text() + "<span>";
              jQuery(this).html(amended).css("display","block"); 
       });
         jQuery("#Left_Menu").children("li").children("a").each(function(){                 
               var amended = "<span class='menu_span'>" + jQuery(this).text() + "<span>";
              jQuery(this).html(amended).css("display","block"); 
       });  
})