#! /bin/bash

declare -A assoc=(
    [foo]="https://example.net"
    [bar]="https://gogo.net"
)

declare -a transformed=()

for key in "${!assoc[@]}"; do
    transformed+=("${assoc[${key}]}")
done

select url in "${transformed[@]}"; do
    echo "Picked: [${url}]"
done