It depends on jQuery 1.7.2. and jQuery-ui 1.8 The jQuery Tagit Plugin transforms an html unordered list into a unique tagging plugin.

Why unique? Because jQuery Tagit uses jQuery UI's auto-complete plugin to supply suggestions to users as they type and has some awesome features like sortable tags.

Quicklinks

• Demo
• Features
• Options
• Methods

Features

• Convenient way for users to enter a list of items
• Fully integrated with jQuery ui auto complete
• Automatically adds current input as tag if input loses focus
• Easy to use public methods
• Easy to theme (single css file)
• Customizable trigger keys
• Backspace on empty input deletes previous tag
• Ability to provide initial tags on creation though options
• Ability to provide initial tags on creation via list items
• Option to toggle usage of a hidden select so the tags can be sent using a normal form!
• Ability to re-arrange tags by drag and drop!

Options

<tr>
  <td>triggerKeys</td>
  <td>Array</td>
  <td>['enter', 'space', 'comma', 'tab']</td>
  <td>An array containing all or any of the default options.<br/>
      These are the keys that will trigger a tag completion
  </td>
</tr>

<tr>
  <td>initialTags</td>
  <td>Array</td>
  <td>[]</td>
  <td>An array containing tags to pre-populate the field with</td>
</tr>

<tr>
  <td>minLength</td>
  <td>Int</td>
  <td>1</td>
  <td>The minimum length before a triggerKey will create a tag</td>
</tr>

<tr>
  <td>maxLength</td>
  <td>Int</td>
  <td>1</td>
  <td>The maximum length a tag is allowed to be</td>
</tr>

<tr>
  <td>select</td>
  <td>Bool</td>
  <td>false</td>
  <td>Maintain a hidden select in place for form submissions<br/>
      To name the select simply give your UL a name attribute!
      ***
      Don't forget
      to include &#91; and &#93; if your language (e.g. PHP) requires them!
  </td>
</tr>

<tr>
  <td>tagsChanged</td>
  <td>Callback</td>
  <td>function(tagValue, action, element)</td>
  <td>Callback on changed tags:
      **tagValue:** string
      **action:** string - either 'added', 'popped', 'moved' or 'reset'
      **element:** object - reference to the added LI element
  </td>
</tr>

<tr>
  <td>caseSensitive</td>
  <td>Bool</td>
  <td>false</td>
  <td>The check for existing tags is case sensitive. 
      If false the words "Foo" and "foo" considered the same
  </td>
</tr>

<tr>
  <td>highlightOnExistColor</td>
  <td>String</td>
  <td>#0F0</td>
  <td>If the user tries to add a tag that already exists the existing 
      tag will run a highlight effect using the defined background color.
      If null, the highlight effect is turned off.
  </td>
</tr>

<tr>
  <td>maxTags</td>
  <td>Int</td>
  <td>unlimited</td>
  <td>The maximum number of tags that the user can enter.
      If omitted, an unlimited number of tags are allowed.
  </td>
</tr>

<tr>
  <td>sortable</td>
  <td>Bool, String</td>
  <td>false</td>
  <td>Allows the user to re-order the tags using drag and drop.
      If true the whole tag is dragable.
      If 'handle' a handle is rendered and the tag is only dragable using the handle.
  </td>
</tr>

Name	Type	Default	Note
tagSource	String, Array, Callback	[]	This option maps directly to the jQuery UI Autocomplete source option

Methods

<tr>
  <td><code>.tagit("tags")<code></td>
  <td>Array</td>
  <td>Returns an array of objects about all the tags.</td>
</tr>

<tr>
  <td><code>.tagit("reset")</code></td>
  <td>null</td>
  <td>Resets the tags list to the initial value</td>
</tr>

<tr>
  <td><code>.tagit("fill", [{label: 'tag', value: 12}, {label: 'stuff', value: 13}])</code></td>
  <td>null</td>
  <td>Empties the tags and fills the plugin with the provided tags.</td>
</tr>

<tr>
  <td><code>.tagit("add", {label: 'tag', value: 12})</code></td>
  <td>Bool</td>
  <td>Adds a tag to the plugin.</td>
</tr>

Name	Return	Note
.tagit("destroy")	null	Returns the ul to its original state

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This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License with original attribution remaining with Matthew Hailwood and http://jquery.webspirited.com.