$(function(){
  $("h2").each(function(i, node){
    var html = $.trim( $(node).html() );
    var re = new RegExp("^[a-zа-я]", "i");
    if( !html.match(re) )
      return;
    
    html = "<span class=\"g\">" + html.slice(0, 1) + "</span>" + html.slice(1);
    $(node).html(html);
  });
})