How to convert array as below

Question

I need to convert a array. This is the value I am getting from the array.

Array
(
    [0] => Array
        (
            [0] => 08:00AM - 10:00AM
        )

    [1] => Array
        (
            [0] => 10:30AM - 12:30AM
        )

)

I need a output like this:

Array
(
    [0] => 08:00AM - 10:00AM
    [1] => 10:30AM - 12:30PM
)

Kindly give me the solution how to convert like above