All Product Parent categories Array
(
    [0] => WP_Term Object
        (
            [term_id] => 25
            [name] => Greer
            [slug] => greer
            [term_group] => 0
            [term_taxonomy_id] => 25
            [taxonomy] => product_cat
            [description] => 
            [parent] => 0
            [count] => 53
            [filter] => raw
        )

    [1] => WP_Term Object
        (
            [term_id] => 36
            [name] => New Products
            [slug] => new-products
            [term_group] => 0
            [term_taxonomy_id] => 36
            [taxonomy] => product_cat
            [description] => 
            [parent] => 0
            [count] => 2
            [filter] => raw
        )

    [2] => WP_Term Object
        (
            [term_id] => 38
            [name] => Rayco-Wylie
            [slug] => rayco-wylie
            [term_group] => 0
            [term_taxonomy_id] => 38
            [taxonomy] => product_cat
            [description] => 
            [parent] => 0
            [count] => 5
            [filter] => raw
        )

    [3] => WP_Term Object
        (
            [term_id] => 45
            [name] => Sigalarm
            [slug] => sigalarm
            [term_group] => 0
            [term_taxonomy_id] => 45
            [taxonomy] => product_cat
            [description] => 
            [parent] => 0
            [count] => 76
            [filter] => raw
        )

    [4] => WP_Term Object
        (
            [term_id] => 62
            [name] => Trimble
            [slug] => trimble
            [term_group] => 0
            [term_taxonomy_id] => 62
            [taxonomy] => product_cat
            [description] => 
            [parent] => 0
            [count] => 27
            [filter] => raw
        )

    [5] => WP_Term Object
        (
            [term_id] => 15
            [name] => Uncategorized
            [slug] => uncategorized
            [term_group] => 0
            [term_taxonomy_id] => 15
            [taxonomy] => product_cat
            [description] => 
            [parent] => 0
            [count] => 0
            [filter] => raw
        )

    [6] => WP_Term Object
        (
            [term_id] => 69
            [name] => WIKA Mobile Control-PAT-Hirschmann
            [slug] => wika-mobile-control-pat-hirschmann
            [term_group] => 0
            [term_taxonomy_id] => 69
            [taxonomy] => product_cat
            [description] => 
            [parent] => 0
            [count] => 44
            [filter] => raw
        )

)