After a fresh install of Centos 6, laptop cant detect wifi

[cntsuser0011]

Hi. I previously just installed centos but I decided to reinstall it today because I've been having issues with connecting to wifi. Its hard for my laptop to connect to wifi and I don't know why. So, I tried to resintall centos hoping that it will solve the problem. After my installation, i noticed that my laptop can't detect any wifi connections.
Why is this happening? And how can I solve this? Thank you.
here is the result of my ifconfig:

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cent@localhost ~]$ ifconfig
eth0      Link encap:Ethernet  HWaddr B8:70:F4:37:B4:DE  
          inet addr:192.168.254.102  Bcast:192.168.254.255  Mask:255.255.255.0
          inet6 addr: fe80::ba70:f4ff:fe37:b4de/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:441887 errors:0 dropped:0 overruns:0 frame:0
          TX packets:279569 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:620700380 (591.9 MiB)  TX bytes:25406756 (24.2 MiB)
          Interrupt:32 Base address:0x4000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:480 (480.0 b)  TX bytes:480 (480.0 b)

------- UPDATE ---------
Hi, this is the ouptut of ifconfig -a

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[cent@localhost ~]$ ifconfig -a
eth0      Link encap:Ethernet  HWaddr B8:70:F4:37:B4:DE  
          inet addr:192.168.254.102  Bcast:192.168.254.255  Mask:255.255.255.0
          inet6 addr: fe80::ba70:f4ff:fe37:b4de/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:447821 errors:0 dropped:0 overruns:0 frame:0
          TX packets:284653 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:626960496 (597.9 MiB)  TX bytes:26231566 (25.0 MiB)
          Interrupt:32 Base address:0x4000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:480 (480.0 b)  TX bytes:480 (480.0 b)

pan0      Link encap:Ethernet  HWaddr EA:FE:06:7D:67:0C  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

Output of lspci -nn | grep -i net

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[cent@localhost ~]$ lspci -nn | grep -i net
05:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
06:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 02)

[TrevorH]

Please post the output of ifconfig -a (the -a tells it to show all detected interfaces, even those that are not active) and also the output of lspci -nn | grep -i net

[cntsuser0011]

I have updated my post.

[toracat]

Your wireless device needs a Broadcom driver. Details on how to build and install this driver is found in ELRepo's article, wl-kmod.