List cac field trong joomla

<field name="font-size" type="list" default="12" description="What size font should the message use?" label="Font size">
    <option value="8">8px</option>
    <option value="12">12px</option>
    <option value="16">16px</option>
</field>

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<field name="color" type="radio" default="black" description="Which color should the message be displayed in?" label="Color">
    <option value="black">black</option>
    <option value="red">red</option>
    <option value="blue">blue</option>
</field>

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<field name="alt-text" type="text" default="" label="Alternative Text" description="Besides Hello World, you can specify other text here to print to the screen instead." />

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$this->params->get('alt-text')
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<fieldset name="basic">
    <field name="text-options" type="spacer" default="Text Settings" label="&lt;b&gt;Text Settings&lt;/b&gt;" description="Text Settings" />
        <field name="alt-text"  type="text" default="" label="Alternative Text" description="Besides Hello World, you can specify other text here to print to the screen instead." />
    <field name="font-options" type="spacer" default="Font Settings" label="&lt;b&gt;Font Settings&lt;/b&gt;" description="Font Settings" />
        <field name="color" type="radio" default="black" description="Which color should the message be displayed in?" label="Color">
            <option value="black">black</option>
            <option value="red">red</option>
            <option value="blue">blue</option>
        </field>
        <field name="font-size" type="list" default="12" description="What size font should the message use?" label="Font size">
            <option value="8">8px</option>
            <option value="12">12px</option>
            <option value="16">16px</option>
        </field>
</fieldset>

How to use Spacers to add HTML

The key to using HTML within a plugin is to change:

• > to >
• < to &lt;

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<field name="great-joomla-hosting" type="spacer" description="InMotion Hosting provides joomla hosting" label="InMotion Hosting provides the &lt;a href='http://www.inmotionhosting.com/joomla-hosting/best-joomla-hosting.html'&gt;best joomla hosting&lt;/a&gt;" />