Replace text field with rich text editor

Hi,
I im trying to replace the input type text to rich text editor in jquery-formbuilder.js
The code goes like this to create a quizz in Buddypress courseware plugin

// adds a radio element
			var appendRadioGroup = function (values, options, required) {
					var title = '';
					if (typeof (options) === 'object') {
						title = options[0];
					}
					field += '<div class="rd_group">';
					field += '<div class="frm-fld"><label>' + opts.messages.title + '</label>';
					field += '<input type="text" name="title" value="' + title + '" /></div>';
					field += '<div class="false-label">' + opts.messages.select_options + '</div>';
					field += '<div class="fields">';
					if (typeof (values) === 'object') {
						for (i = 0; i < values.length; i++) {
							field += radioFieldHtml(values[i], 'frm-' + last_id + '-fld');
						}
					}
					else {
						field += radioFieldHtml('', 'frm-' + last_id + '-fld');
					}
					field += '<div class="add-area"><a href="#" class="add add_rd">' + opts.messages.add + '</a></div>';
					field += '</div>';
					field += '</div>';
					help = '';
					appendFieldLi(opts.messages.radio_group, field, required, help);
				};

Now the sixth or seventh line defines the text field within the form for radio type quiz question
i.e field += '<input type="text" name="title" value="' + title + '" /></div>';
So, is there any function call or method to replace the <input type="text" > to < ?php wp-editor?> so the quizzes can add rich text area for questions and answers insead of plain single line text box. Any help would be highly appreciated.
Cheers
Satish