each_table_td-col-num.js

function each_table_td( selector, td_num, find_regexp, replace_regexp, replace_mask, _e){
  _e = {};
    $( selector ).each(function(index_1, el) {
                _e.num = 0;
      $(el).find('tr td').each(function(index_2, el_2) {
                _e.num++;
          if ( (_e.num % td_num) === 0) {
                _e.td = $(this).html();
              //$(this).addClass('this_test');
              if (find_regexp.test(_e.td)){
                  _e.td = _e.td.replace(replace_regexp, replace_mask);
                  $(this).html(_e.td);
              }
          }
      });
    });
}

setTimeout(function(){
  each_table_td( '.new_table table', 3, /(от)?[\s-]*[\d]+/, /([\d]+[-\s\d]*)/, '<span class="num">$1</span>');
}, 500);