The two templates involved:

<script type="text/html" id="js_line_default">
  <div class="lzLine">
    <% for (var i=0; i < line.nodes.length; i++) { %>
      <% var html = line.nodes[i].html(); %>
      <%= html %>
    <% } %>
  </div>
</script>

<script type="text/html" id="js_node_default">
  <span class="lzNode">
    <%= node.text %>
  </span>
</script>

The two classes involved:

  var lzLine = function(line, element) {
    var that = this;
    this.element = element;

    this.tmpl = "js_line_" + line.tmpl;
    this.nodes = [];
    var nodes = line.nodes;
    for (var i=0; i < nodes.length; i++) {
      var thisNode = new lzNode(nodes[i], this);
      this.nodes.push(thisNode);
      }
    this.html = function() { return tmpl('js_line_default', {'line': line}) };
    }

  var lzNode = function(node, line) {
    var that = this;
    this.tmpl = "js_node_" + node.tmpl;
    this.line = line;
    this.html = function() { return tmpl('js_node_default', {'node': node}) };
    }