To set the field’s label using the LabelText’s property.

CheckboxList is a databindable control. Bind it to fill the control, use DataTextField / DataValueField / DataNameField
If you want a horizontal layout, set DataType property to Horizontal.

Code:

    <mob:MobilePage ID="mbPage1" runat="server">
        <Header>
            <h1>Checkboxes example</h1>
        </Header>
        <Content>
            <p>
            <h2>Simple checkboxlist</h2>
            <mob:CheckboxList ID="cbCars" DataNameField="Name" DataTextField="Name" DataValueField="Name" Text="Choose a car" runat="server"></mob:CheckboxList>
            </p>
            <p>
            <h2>Simple checkboxlist with a Horizontal layout.</h2>
            Set DataType="Horizontal".
            <mob:CheckboxList ID="cbCars2" DataType="Horizontal" DataNameField="Name" DataTextField="Name" DataValueField="Name" Text="Choose a car" runat="server"></mob:CheckboxList>
            </p>
        </Content>
        <Footer>
            <h1>Footer</h1>
        </Footer>
    </mob:MobilePage>

Result: