XML search tags and replace value

I have a xml file which I have several times

<device id = "1">
<details>
    <entry>
        <key> test </ key>
        <value> value </ value>
    </ entry>
    <entry>
        <key> attempt </ key>
        <value> Result </ value>
    </ entry>
</ details>
</ device>
<device id = "2">
<details>
    <entry>
        <key> test </ key>
        <value> value </ value>
    </ entry>
    <entry>
        <key> attempt </ key>
        <value> Result </ value>
    </ entry>
</ details>
</ device>

etc ... and I need to make

<entry>
    <key> test </ key>
    <value> value </ value>
</ entry>

on

<test> value </ test>

u all listings devices. Thank you for your advice