Colombia's central bank likely to hold rates to bolster growth

* Analysts see rate unchanged amid growth, low inflation * Colombian currency, bonds weakened over Fed stimulus talk * Rate unchanged since March after cuts summing 200 bps By Helen Murphy BOGOTA, June 28 (Reuters) - Colombia's central bank will likely hold its benchmark interest rate steady for a third straight month on Friday as benign inflation gives policymakers room to keep nourishing the economy's weak manufacturing and export sector. The seven-member board - headed by Jose Dario Uribe - is expected to maintain borrowing costs at 3.25 percent, according to 24 analysts polled by Reuters earlier this week. Another two predict the bank will opt for further stimulus and cut the rate a...