Unnamed

Hello,

I have an array like this:

Array
(
    [0] => Array
        (
            [0] => Autos-Vehicles
            [channel_name] => Autos-Vehicles
        )

    [1] => Array
        (
            [0] => Bollywood
            [channel_name] => Bollywood
        )

    [2] => Array
        (
            [0] => Cartoons
            [channel_name] => Cartoons
        )
)


How can I display it like this

Array
(
            [0] => Autos-Vehicles
            [1] => Bollywood
            [2] => Cartoons
)